MESON Chess Problem Database

Problem Display
PID: 42450 (b3R2r/p4nB1/3kNR2/1Q1p1B2/7q/3nP2p/5p2/b4K2 w - - 0 1)

Touw Hian Bwee

4th Prize, BCF 113. Ty., 1966-1967

b3R2r/p4nB1/3kNR2/1Q1p1B2/7q/3nP2p/5p2/b4K2

#2

8 + 11

3772 FIDE Album (1965-1967) 1976
6144 Greek Solving Championship 2007
6352 A Collection of Chess Problems by Touw Hian Bwee 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Sf8#
  • Tries
    • 1.Sd4+?
      • 1...Kc7
        • 2.Qd7#
        • 2.Qb8#
      • 1...Qxf6!
    • 1.Sg5+?
      • 1...Kc7
        • 2.Qd7#
        • 2.Qb8#
      • 1...Bxf6!
    • 1.Qd7+?
      • 1...Ke5
        • 2.Sf8#
      • 1...Kxd7!
    • 1.Qc5+?
      • 1...Ke5
        • 2.Sf8#
      • 1...Kd7
        • 2.Sc7#
        • 2.Re7#
      • 1...Sxc5!
    • 1.Qb6+?
      • 1...Ke5
        • 2.Sf8#
      • 1...Kd7
        • 2.Sc7#
      • 1...Bc6
        • 2.Qc7#
      • 1...axb6!
    • 1.Qb8+?
      • 1...Kd7
        • 2.Sd4#
        • 2.Sf4#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sc7#
        • 2.Sf8#
      • 1...Kc6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc7#
      • 1...Ke5
        • 2.Sf8#
      • 1...Kc6
        • 2.Sd8#
      • 1...Kd7
        • 2.Sc7#
      • 1...Qc4
        • 2.Sd4#
      • 1...d4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(g);P_SPINP(f),S_FLIGHT::R(H)+S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • Q(e);XR(F)
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XR(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(g);S_FLIGHT::R(H)+S(E)
      • Refutation
        • K(g);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(g);P_SPINP(f),S_FLIGHT::R(H)+S(E)
      • Refutation
        • S(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(g);S_FLIGHT::R(H)+S(E)
        • K(g);P-FLIGHT::B(D)+S(E)
        • B(j);P_SPINB(j)::QAB1(C)
      • Refutation
        • P(h);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(g);P_SPINP(f),S_FLIGHT::R(H)+S(E)
      • K(g);P-FLIGHT::R(F)+S(E),DCHECK
      • K(g);P-FLIGHT::B(D)+S(E)
      • Q(e);N_GUARD::R(F)+S(E)
      • P(f);S_CUTB(a)::R(F)+S(E)
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