MESON Chess Problem Database

Problem Display
PID: 10928 (K3R3/1N2b2P/2Q5/2p5/3kNpP1/R2n1r2/P2r4/2B2B2 w - - 0 1)

Touw Hian Bwee

2nd HM., The Problemist, 1969

K3R3/1N2b2P/2Q5/2p5/3kNpP1/R2n1r2/P2r4/2B2B2

#2

11 + 7

3751 FIDE Album (1968-1970) 1977
273 Mat Plus 1994
6352 A Collection of Chess Problems by Touw Hian Bwee 2008
17483 Hull Solving Ty. 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Rxd3#
    • 1...Kc4
      • 2.Ra4#
    • 1...Ke5
      • 2.h8Q#
      • 2.h8B#
  • Tries
    • 1.Sxd2?
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qxc5#
      • 1...Ke5
        • 2.Sxf3#
        • 2.Qd6#
        • 2.h8Q#
        • 2.h8B#
      • 1...Sf2
        • 2.Sxf3#
      • 1...Re3!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Bxd2#
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Kxd5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qxc5#
      • 1...Kc4
        • 2.Qa4#
      • 1...Ke5
        • 2.Qd6#
      • 1...Re2
        • 2.Qd5#
      • 1...Re3
        • 2.Qd5#
      • 1...Sf2
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINR(a),P_SPINS(b),S_FLIGHT::R1(D),XS(b)
    • K(d);P-FLIGHT,P_SPINP(f),P_SPINS(b)::R(D)
    • K(d);P_SPINB(g),S_FLIGHT::P=Q
  • Tries
    • Try
      • S(E);XR(a)
      • Threat
        • QAR1(G)
      • Vars
        • K(d);P_SPINB(g),P_SPINS(b),S_FLIGHT::QAB(G),XP(f)
        • S(b);::S(E),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(G);CHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(G)
  • Actual
    • S(E);
    • Threat
      • QAR1(G)
    • Vars
      • K(d);P_SPINB(g),P_SPINR(a),P_SPINS(b),S_FLIGHT::QAB(G),XP(f)
      • K(d);P-FLIGHT,P_SPINP(f),P_SPINS(b)::QAR2(G)
      • K(d);P_SPINB(g),S_FLIGHT::QAB1(G)
      • R(a);::QAR1(G)
      • R(c);SBLOCK::QAR1(G)
      • S(b);::QAR1(G)
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