MESON Chess Problem Database

Problem Display
PID: 225122 (1b6/3Qp3/2p4P/4k1B1/K3P1rR/5p2/8/2n1R3 w - - 0 1)

Maybee, Edward E

US Problem Bulletin, 1965

1b6/3Qp3/2p4P/4k1B1/K3P1rR/5p2/8/2n1R3

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4+
      • 2.Rexe4#
      • 2.Rhxe4#
    • 1...c5
      • 2.Qd5#
  • Tries
    • 1.Bf6+?
      • 1...Kf4
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Kxf6
        • 2.Qf5#
      • 1...exf6!
  • Keys
    • 1.Be3!
      • threat
        • 2.Qxe7#
      • 1...Rxe4+
        • 2.Bd4#
      • 1...Kxe4
        • 2.Bxc1#
      • 1...Kf6
        • 2.Qf5#
      • 1...Rg6
        • 2.Bd4#
      • 1...Rg7
        • 2.Bd4#
      • 1...Bd6
        • 2.Qf5#
      • 1...e6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD::QAR1(G)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(d);S_FLIGHT,XB(E)::QAR1(G)
      • Refutation
        • P(f);XB(E)
  • Actual
    • B(E);
    • Threat
      • QAR2(G),XP(f)
    • Vars
      • R(c);CHECK,XP(C)::B(E)
      • K(d);OGATEB,P-FLIGHT,P_SPINR(c),XP(C)::R(A)+B(E),XS(a)
      • K(d);S_FLIGHT::QAR1(G)
      • R(c);N_PINP(C)::B(E)
      • B(g);SBLOCK::QAR1(G)
      • P(f);SBLOCK::QAB1(G)
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