MESON Chess Problem Database

Problem Display
PID: 51814 (3K2BB/4pp2/Q1NN1R1p/PP1k2bR/1P6/8/8/8 w - - 0 1)

Rice, William Bayard

3rd Prize, Good Companions (April), 1917

3K2BB/4pp2/Q1NN1R1p/PP1k2bR/1P6/8/8/8

#2

11 + 5

3132 The Good Companion Two-Mover 1922
5064 100 Years of the American Two-move Chess Problem 1962

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Bxf7#
  • Tries
    • 1.Rxg5+?
      • 1...e5
        • 2.Bxf7#
        • 2.Rxe5#
      • 1...hxg5!
    • 1.Rf5+?
      • 1...Kxd6
        • 2.Sd4#
        • 2.Sa7#
        • 2.Sxe7#
        • 2.Sb8#
      • 1...Ke6
        • 2.Sd4#
      • 1...e5+!
    • 1.Qb6?
      • threat
        • 2.Qd4#
        • 2.Qc5#
      • 1...exd6
        • 2.Qd4#
      • 1...e5
        • 2.Se7#
        • 2.Bxf7#
        • 2.Qc5#
      • 1...exf6!
    • 1.Qa7?
      • threat
        • 2.Qd4#
        • 2.Qc5#
      • 1...exd6
        • 2.Qd4#
      • 1...e5
        • 2.Se7#
        • 2.Bxf7#
        • 2.Qc5#
        • 2.Qxf7#
      • 1...exf6!
  • Keys
    • 1.Rxf7!
      • 1...exd6+
        • 2.Re7#
      • 1...e5+
        • 2.Rf6#
      • 1...e6+
        • 2.Se7#
      • 1...Kxd6
        • 2.Sxe7#
      • 1...Ke6
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD,N_SPINB(b),P_PINR(H)::B(J),XP(e)
  • Tries
    • Try
      • R(D);CHECK,XB(b)
      • Refutation
        • P(c);XR(D)
    • Try
      • R(H);CHECK,N_PINB(b)
      • Vars
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • P(d);CHECK,N_SPINP(e),P_SPINP(d)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);P_PINR(H),XS(G)::QAR1(E)
      • Refutation
        • P(d);XR(H)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);P_PINR(H),XS(G)::QAR1(E)
      • Refutation
        • P(d);XR(H)
  • Actual
    • R(H);XP(e)
    • Vars
      • P(d);CHECK,SBLOCK,XS(G)::B(J)+R(H)
      • P(d);CHECK,N_GUARD,N_SPINB(b)::B(J)+R(H)
      • P(d);CHECK,SBLOCK::S(F)
      • K(a);N_SPINB(b),P-FLIGHT,XS(G)::QAR(E)+S(F),XP(d)
      • K(a);N_SPINB(b),S_FLIGHT::B(J)+R(H),DCHECK
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