MESON Chess Problem Database

Problem Display
PID: 78670 (3R1R2/3B1N2/r7/2pN2p1/3PkB2/pQ6/8/K7 w - - 0 1)

Touw Hian Bwee

2nd Prize, The Observer, 1962

3R1R2/3B1N2/r7/2pN2p1/3PkB2/pQ6/8/K7

#2

9 + 5

6352 A Collection of Chess Problems by Touw Hian Bwee 2008
56 The Problemist 2017

SOLUTION

  • SOUND
  • Sets
    • 1...cxd4
      • 2.Sxg5#
  • Tries
    • 1.Sd6+?
      • 1...Kxd4
        • 2.Qd1#
        • 2.Qc4#
      • 1...Rxd6!
    • 1.Bf5+?
      • 1...Kxd4
        • 2.Sb6#
        • 2.Be3#
        • 2.Be5#
        • 2.Qc3#
        • 2.Qd3#
      • 1...Kxf5!
    • 1.Rde8+?
      • 1...Kxd4
        • 2.Be3#
      • 1...Re6!
    • 1.Rfe8+?
      • 1...Kxd4
        • 2.Be3#
      • 1...Re6!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qe3#
      • 1...Kxd4
        • 2.Bc6#
      • 1...Kxf4
        • 2.Sd6#
      • 1...cxd4
        • 2.Sxg5#
      • 1...gxf4
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK,XP(C)::S(G),XP(d)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • R(e);XS(G)
    • Try
      • B(F);CHECK
      • Refutation
        • K(b);S_FLIGHT,XB(F)
    • Try
      • R(H);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(C)::B(D)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • R(I);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(C)::B(D)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(E);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT,XP(C)::R(H)+B(F)
      • K(b);P-FLIGHT,XB(D)::R(I)+S(G)
      • P(c);SBLOCK,XP(C)::S(G),XP(d)
      • P(d);SBLOCK,XB(D)::B(F)
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