MESON Chess Problem Database

Problem Display
PID: 225314 (8/2nQB2K/q2n3b/4kp2/5R2/3bppp1/B4NN1/3R4 w - - 0 1)

Costikyan, Simon

1st Prize, New York Post, 1942

8/2nQB2K/q2n3b/4kp2/5R2/3bppp1/B4NN1/3R4

#2

8 + 10

788 US Problem Bulletin 1967

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxd6#
    • 1...Qb5
      • 2.Qxd6#
    • 1...Qb7
      • 2.Sxd3#
      • 2.Qxd6#
    • 1...Qc8
      • 2.Sxd3#
      • 2.Qxd6#
    • 1...Qxa2
      • 2.Qxd6#
    • 1...Qa4
      • 2.Sxd3#
      • 2.Qxd6#
    • 1...Qa5
      • 2.Sxd3#
      • 2.Qxd6#
    • 1...Qb6
      • 2.Sxd3#
    • 1...Qc6
      • 2.Sxd3#
    • 1...Qa7
      • 2.Sxd3#
      • 2.Qxd6#
    • 1...Qa8
      • 2.Sxd3#
      • 2.Qxd6#
    • 1...Sc4
      • 2.Sxd3#
    • 1...Se4
      • 2.Rxf5#
    • 1...Sdb5
      • 2.Sxd3#
    • 1...Sb7
      • 2.Qd4#
    • 1...Sf7
      • 2.Qd4#
    • 1...Sc8
      • 2.Qd4#
    • 1...Sde8
      • 2.Qd4#
    • 1...Scb5
      • 2.Sxd3#
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sa8
      • 2.Qe6#
    • 1...Sce8
      • 2.Qe6#
  • Tries
    • 1.Bxd6+?
      • 1...Kf6
        • 2.Qe7#
        • 2.Qd8#
      • 1...Qxd6!
    • 1.Qxf5+?
      • 1...Sxf5
        • 2.Sg4#
      • 1...Bxf5+!
  • Keys
    • 1.Sh4!
      • threat
        • 2.Sg6#
      • 1...Kxf4
        • 2.Sg6#
      • 1...Qxa2
        • 2.Qxd6#
      • 1...Bxf4
        • 2.Sxf3#
      • 1...Qc4
        • 2.Qxd6#
      • 1...Sc4
        • 2.Sxd3#
      • 1...Se4
        • 2.Rxf5#
      • 1...Sdb5
        • 2.Sxd3#
      • 1...Sb7
        • 2.Qd4#
      • 1...Sf7
        • 2.Qd4#
      • 1...Sc8
        • 2.Qd4#
      • 1...Sde8
        • 2.Qd4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_GUARD::QAB1(F),XS(h)
    • Q(g);N_GUARD,XB(B)::QAB1(F),XS(h)
    • Q(g);N_GUARD::S(C),XB(a)
    • S(h);S_CUTQ(g)::S(C),XB(a)
    • S(h);N_GUARD,S_CUTB(a)::R1(E),XP(f)
    • S(h);OGATE::QAB1(F)
    • S(j);N_GUARD::QAR1(F),XS(j)
    • S(j);N_GUARD::QAR1(F)
  • Tries
    • Try
      • B(G);CHECK,XS(h)
      • Refutation
        • Q(g);XB(G)
    • Try
      • Q(F);CHECK,P_SPINQ(F),XP(f)
      • Vars
        • S(h);XQ(F)::S(C)
      • Refutation
        • B(a);CHECK,XQ(F)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(e);S_FLIGHT,XR(E)::S(D)
      • Q(g);N_GUARD,XB(B)::QAB1(F),XS(h)
      • B(i);SBLOCK,XR(E)::S(D),XP(c)
      • Q(g);N_GUARD::QAB1(F),XS(h)
      • S(h);S_CUTQ(g)::S(C),XB(a)
      • S(h);N_GUARD,S_CUTB(a)::R1(E),XP(f)
      • S(h);OGATE::QAB1(F)
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