MESON Chess Problem Database

Problem Display
PID: 11175 (8/1B3r2/p2Q1R2/3NB2r/1Rb1k1P1/KP1p4/2p2q2/2N3b1 w - - 0 1)

Chapman, CF

Chess, 1937

8/1B3r2/p2Q1R2/3NB2r/1Rb1k1P1/KP1p4/2p2q2/2N3b1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sc3#
      • 2.Sc7#
      • 2.Se7#
  • Tries
    • 1.Se3+?
      • 1...Rxb7
        • 2.Qd4#
      • 1...Kxe3!
    • 1.Sb6+?
      • 1...Ke3
        • 2.Sxc4#
      • 1...Rxb7!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Sc3#
      • 1...Kxd4
        • 2.Rxc4#
      • 1...Qxd4
        • 2.Qf4#
      • 1...Rxd5
        • 2.Qe5#
      • 1...Bxd5
        • 2.Bxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(i);XB(J)::QAR1(H)
      • Refutation
        • K(f);N_SPINB(e),P-FLIGHT,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);N_SPINB(e),P-FLIGHT::S(F),XB(e)
      • Refutation
        • R(i);XB(J)
  • Actual
    • B(G);N_PINB(e)
    • Threat
      • B(J)+S(F),DCHECK
    • Vars
      • K(f);OGATEB,P-FLIGHT,P_SPINB(e),XB(G)::R1(D),XB(e)
      • Q(c);N_GUARD,SBLOCK,XB(G)::QAR1(H)
      • R(g);N_GUARD,P_SPINR(g),XS(F)::QAR1(H)
      • B(e);OGATEB,P_SPINB(e),XS(F)::R(D)+B(G),XQ(c)
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