MESON Chess Problem Database

Problem Display
PID: 245955 (k7/1b6/p2Q4/3R4/8/8/4K3/7B w - - 0 1)

Lincoln, Robert A

Sem Shakhmatnikh not, 2010

k7/1b6/p2Q4/3R4/8/8/4K3/7B

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Rxa5#
  • Tries
    • 1.Qc7?
      • 1...Bxd5
        • 2.Bxd5#
      • 1...Bc6
        • 2.Rd8#
      • 1...Bc8
        • 2.Rd8#
      • 1...a5
        • 2.Rxa5#
      • 1...Ka7!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Rd8#
      • 1...Kb8
        • 2.Rd8#
      • 1...Bxd5
        • 2.Bxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATEB::R(C),XP(a)
  • Tries
    • Try
      • Q(D);
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(C)::B(A),XB(b)
        • B(b);::R(C)
        • B(b);::B(A)+R(C)
        • P(a);OGATEB::R(C),XP(a)
      • Refutation
        • K(c);P-FLIGHT,P_SPINB(b)
  • Actual
    • Q(D);
    • Threat
      • R(C)
    • Vars
      • K(c);P-FLIGHT,P_SPINB(b)::R(C)
      • B(b);OGATE,P_SPINB(b),XR(C)::B(A),XB(b)
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