MESON Chess Problem Database

Problem Display
PID: 79570 (1nN5/3rR1p1/2P2P2/bB1kp2p/2R3Qr/2p3Nb/6pB/K4n2 w - - 0 1)

Touw Hian Bwee

3rd Prize, Schakend Nederland, 1967

1nN5/3rR1p1/2P2P2/bB1kp2p/2R3Qr/2p3Nb/6pB/K4n2

#2

10 + 12

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

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Rxd7#
    • 1...Sxc6
      • 2.Bxc6#
      • 2.Rxd7#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Rxe5#
      • 1...Rxe7
        • 2.Sfxe7#
      • 1...Sxh2
        • 2.Se3#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...gxf6
        • 2.Qg8#
      • 1...Sg3
        • 2.Se3#
      • 1...e4
        • 2.Re5#
      • 1...Bc7!
    • 1.Qf3+?
      • 1...Re4
        • 2.Qxe4#
      • 1...e4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Rxe5#
      • 1...Rxe7
        • 2.Sxe7#
      • 1...Sxh2
        • 2.Qd1#
      • 1...Sxc6
        • 2.Rxd7#
      • 1...gxf6
        • 2.Sxf6#
      • 1...Bc7
        • 2.Sxc3#
      • 1...Sg3
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(l);N_GUARD::R(I),XR(j)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(I),XP(h)
      • Vars
        • R(j);XR(I)::S(C),XR(j)
        • S(a);N_GUARD,XB(B)::S(C)
        • S(l);OGATE,XP(G)::B(F),XS(l)
        • P(k);OGATE,XP(H)::QAB(E)
        • S(a);N_GUARD::S(C)
        • P(h);::R1(I)
      • Refutation
        • B(f);
    • Try
      • Q(E);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(E),XR(e)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(C);
    • Threat
      • R1(I),XP(h)
    • Vars
      • R(j);XR(I)::S(J),XR(j)
      • S(a);N_GUARD,XB(B)::QAR(E)
      • S(l);N_GUARD,XP(G)::R(I),XR(j)
      • P(k);XP(H)::S(C),XP(k)
      • B(f);N_GUARD::S(C),XP(c)
      • S(a);N_GUARD::QAR(E)
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