MESON Chess Problem Database

Problem Display
PID: 145244 (4B3/5P2/p7/P1P2N2/1kN1p3/1P5R/1p2RB2/1Q1K4 w - - 0 1)

McDowell, Michael

The Problemist, 1986

4B3/5P2/p7/P1P2N2/1kN1p3/1P5R/1p2RB2/1Q1K4

#2

12 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sfe3?
      • threat
        • 2.Sc2#
        • 2.Sd5#
      • 1...Kxb3
        • 2.Qxb2#
      • 1...Kc3
        • 2.Sd5#
      • 1...Kxc5!
    • 1.Be3?
      • 1...Kc3
        • 2.Bd2#
      • 1...Kxb3!
  • Keys
    • 1.Sce3!
      • 1...Ka3
        • 2.Sc2#
      • 1...Kxb3
        • 2.Qxb2#
      • 1...Kc3
        • 2.Sd5#
      • 1...Kxa5
        • 2.Be1#
      • 1...Kxc5
        • 2.f8Q#
        • 2.f8B#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINP(a),XP(E)::QAR1(A),XP(a)
        • K(b);S_FLIGHT::R(F)+S(J),DCHECK
      • Refutation
        • K(b);S_FLIGHT,XP(I)
    • Try
      • B(D);
      • Vars
        • K(b);S_FLIGHT::R(F)+B(D),DCHECK
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a),XP(E)
  • Actual
    • S(G);
    • Vars
      • K(b);S_FLIGHT::S(G)
      • K(b);OGATEB,P-FLIGHT,P_SPINP(a),XP(E)::QAR1(A),XP(a)
      • K(b);S_FLIGHT::R(F)+S(G),DCHECK
      • K(b);S_FLIGHT,XP(H)::B(D)
      • K(b);S_FLIGHT,XP(I)::P=Q
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