MESON Chess Problem Database

Problem Display
PID: 2291 (2B5/p2rpR1r/1pKbkqbR/5n2/n7/1P3NQ1/7B/8 w - - 0 1)

Crosby, Theo B

Source?, 0000

2B5/p2rpR1r/1pKbkqbR/5n2/n7/1P3NQ1/7B/8

#2

8 + 11

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sg5#
    • 1...Qb2
      • 2.Sg5#
    • 1...Qd4
      • 2.Sg5#
    • 1...Qe5
      • 2.Sg5#
    • 1...Qg5
      • 2.Sxg5#
    • 1...Qg7
      • 2.Sg5#
    • 1...Qh8
      • 2.Sg5#
    • 1...Rxf7
      • 2.Bxd7#
    • 1...Bh5
      • 2.Sg5#
    • 1...Bxf7
      • 2.Sg5#
      • 2.Bxd7#
  • Tries
    • 1.Rxf6+?
      • 1...Kxf6
        • 2.Qxg6#
      • 1...exf6!
  • Keys
    • 1.Qxg6!
      • threat
        • 2.Sg5#
        • 2.Bxd7#
      • 1...Sd4+
        • 2.Sxd4#
      • 1...Qxg6
        • 2.Sg5#
      • 1...Bxh2
        • 2.Bxd7#
      • 1...Bg3
        • 2.Bxd7#
      • 1...Bf4
        • 2.Bxd7#
      • 1...Sc5
        • 2.Sg5#
      • 1...Sg3
        • 2.Bxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • Q(f);N_GUARD,P_SPINB(g)::S(C)
    • Q(f);N_GUARD,P_SPINB(g)::S(C),XQ(f)
    • R(k);SBLOCK,XR(G)::B(H),XR(i)
    • B(g);P_SPINQ(f)::S(C)
  • Tries
    • Try
      • R(G);CHECK,XQ(f)
      • Vars
        • K(e);N_SPINR(i),P-FLIGHT,P_SPINB(g),XR(G)::QAR1(D),XB(g)
      • Refutation
        • P(j);XR(G)
  • Actual
    • Q(D);P_PINQ(f),XB(g)
    • Threat
      • DUALS(2)
    • Vars
      • S(b);CHECK,N_GUARD::S(C),XS(b)
      • Q(f);XQ(D)::S(C)
      • B(d);XB(A)::B(H),XR(i)
      • B(d);::B(H),XR(i)
      • S(a);::S(C)
      • S(b);::B(H),XR(i)
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