MESON Chess Problem Database

Problem Display
PID: 109389 (1Q1r4/2R5/2N5/p3p1B1/p1B5/b1k2N2/K1p1P3/2R3q1 w - - 0 1)

Sim, Malcolm

South African Chess Player, 1955

1Q1r4/2R5/2N5/p3p1B1/p1B5/b1k2N2/K1p1P3/2R3q1

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bd3?
      • threat
        • 2.Bd2#
        • 2.Rxc2#
      • 1...Qxc1
        • 2.Sb4#
      • 1...Qxg5
        • 2.Sb4#
        • 2.Rxc2#
      • 1...Bxc1
        • 2.Scd4#
      • 1...Qe3
        • 2.Rxc2#
      • 1...Qd1
        • 2.Sb4#
      • 1...Qe1
        • 2.Sb4#
        • 2.Rxc2#
      • 1...Rxd3!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Rxc2#
      • 1...axb3+
        • 2.Qxb3#
      • 1...Qxc1
        • 2.Sb4#
      • 1...Bxc1
        • 2.Scd4#
      • 1...Qd1
        • 2.Sb4#
      • 1...Rd2
        • 2.Bxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);N_GUARD,N_SPINP(b),XR(A)::R(H)+S(G)
        • B(c);N_GUARD,N_SPINP(b),XR(A)::R(H)+S(G)
        • Q(a);::R1(A),XP(b)
        • Q(a);N_GUARD::R(H)+S(G)
      • Refutation
        • R(h);XB(E)
  • Actual
    • B(E);
    • Threat
      • R1(A),XP(b)
    • Vars
      • P(e);CHECK,OGATE,XB(E)::QAR1(I),XP(e)
      • Q(a);N_GUARD,N_SPINP(b),XR(A)::R(H)+S(G)
      • B(c);N_GUARD,N_SPINP(b),XR(A)::R(H)+S(G)
      • Q(a);N_GUARD::R(H)+S(G)
      • R(h);N_GUARD::B(F),XR(h)
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