From: Marco Costalba <mcostalba@gmail.com>
Date: Fri, 19 Jul 2013 07:37:31 +0000 (+0200)
Subject: Better document what we skip when in check
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=110644d91834fbf44859aa9aad63c23ed1dafc56;ds=sidebyside

Better document what we skip when in check

No functional change.
---

diff --git a/src/search.cpp b/src/search.cpp
index eae2ea27..3985ad30 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -623,7 +623,7 @@ namespace {
         Gains.update(pos.piece_on(to), to, -(ss-1)->staticEval - ss->staticEval);
     }
 
-    // Step 6. Razoring (is omitted in PV nodes)
+    // Step 6. Razoring (skipped when in check)
     if (   !PvNode
         &&  depth < 4 * ONE_PLY
         &&  eval + razor_margin(depth) < beta
@@ -639,7 +639,7 @@ namespace {
             return v;
     }
 
-    // Step 7. Static null move pruning (is omitted in PV nodes)
+    // Step 7. Static null move pruning (skipped when in check)
     // We're betting that the opponent doesn't have a move that will reduce
     // the score by more than futility_margin(depth) if we do a null move.
     if (   !PvNode
@@ -710,7 +710,7 @@ namespace {
         }
     }
 
-    // Step 9. ProbCut (is omitted in PV nodes)
+    // Step 9. ProbCut (skipped when in check)
     // If we have a very good capture (i.e. SEE > seeValues[captured_piece_type])
     // and a reduced search returns a value much above beta, we can (almost) safely
     // prune the previous move.
@@ -741,7 +741,7 @@ namespace {
             }
     }
 
-    // Step 10. Internal iterative deepening
+    // Step 10. Internal iterative deepening (skipped when in check)
     if (   depth >= (PvNode ? 5 * ONE_PLY : 8 * ONE_PLY)
         && ttMove == MOVE_NONE
         && (PvNode || ss->staticEval + Value(256) >= beta))