MESON Chess Problem Database

Problem Display
PID: 72342 (4R3/bbP5/p1rk1NR1/1B2n1p1/PNpp4/B5K1/7Q/8 w - - 0 1)

Major, Montgomery

Chess, 1953

4R3/bbP5/p1rk1NR1/1B2n1p1/PNpp4/B5K1/7Q/8

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Sbd5#
    • 1...Kxc7
      • 2.Sbd5#
    • 1...Rb6
      • 2.Sbd5#
      • 2.Sxa6#
    • 1...Rxc7
      • 2.Se4#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Qxe5#
      • 1...Kc5
        • 2.Sbd5#
      • 1...Kxc7
        • 2.Sbd5#
      • 1...Rc5
        • 2.Sfd5#
      • 1...d3+!
  • Keys
    • 1.Kg2!
      • threat
        • 2.Qxe5#
      • 1...Rc5+
        • 2.Sfd5#
      • 1...Rb6+
        • 2.Sbd5#
      • 1...Rxc7+
        • 2.Se4#
      • 1...Kc5
        • 2.Sbd5#
      • 1...Kxc7
        • 2.Sbd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(g);S_FLIGHT::B(B)+S(E)
    • K(g);S_FLIGHT,XP(I)::S(E)
    • R(f);SBLOCK,XP(I)::R(H)+S(G),DCHECK
  • Tries
    • Try
      • K(C);P_PINS(c),S_FLIGHT
      • Threat
        • QAB1(A),XS(c)
      • Vars
        • K(g);N_SPINS(c),S_FLIGHT::B(B)+S(E)
        • K(g);S_FLIGHT,XP(I)::S(E)
        • R(f);SBLOCK::R(H)+S(G)
      • Refutation
        • P(b);CHECK
  • Actual
    • K(C);P-FLIGHT,P_PINS(c)
    • Threat
      • QAB1(A),XS(c)
    • Vars
      • R(f);CHECK,SBLOCK::R(H)+S(G)
      • R(f);CHECK,N_GUARD,S_CUTB(h)::B(B)+S(E)
      • R(f);CHECK,SBLOCK,XP(I)::R(H)+S(G),DCHECK
      • K(g);N_SPINS(c),S_FLIGHT::B(B)+S(E)
      • K(g);S_FLIGHT,XP(I)::S(E)
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