MESON Chess Problem Database

Problem Display
PID: 56490 (5rk1/8/5pK1/8/8/8/RB4Q1/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2005

5rk1/8/5pK1/8/8/8/RB4Q1/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Rxa8#
      • 2.Qxa8#
  • Tries
    • 1.Kh6+?
      • 1...Kh8
        • 2.Qg7#
      • 1...Kf7!
    • 1.Qd5+?
      • 1...Rf7
        • 2.Ra8#
      • 1...Kh8!
    • 1.Qb7?
      • threat
        • 2.Qg7#
        • 2.Qh7#
      • 1...Kh8
        • 2.Qg7#
        • 2.Qh7#
      • 1...Ra8
        • 2.Rxa8#
        • 2.Qxa8#
        • 2.Qg7#
      • 1...Rb8
        • 2.Qg7#
        • 2.Qxb8#
      • 1...Rc8
        • 2.Qxc8#
        • 2.Qg7#
      • 1...Rd8
        • 2.Qg7#
      • 1...Re8
        • 2.Qg7#
      • 1...Rf7!
    • 1.Qa8?
      • 1...Kh8
        • 2.Qxf8#
      • 1...Rxa8
        • 2.Rxa8#
      • 1...Rb8
        • 2.Qxb8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Re8
        • 2.Qxe8#
      • 1...f5!
  • Keys
    • 1.Ra8!
      • 1...Kh8
        • 2.Rxf8#
      • 1...Rxa8
        • 2.Qxa8#
      • 1...Rb8
        • 2.Rxb8#
      • 1...Rc8
        • 2.Rxc8#
      • 1...Rd8
        • 2.Rxd8#
      • 1...Re8
        • 2.Rxe8#
      • 1...f5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);CHECK,P-FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(A)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(C)
      • Refutation
        • R(b);
    • Try
      • Q(C);P_PINR(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAR2(C),XR(b)
        • R(b);N_SPINR(b),OGATE,XQ(C)::R(A),XR(b)
        • R(b);OGATEB::QAR(C),XR(b)
        • R(b);OGATEB::QAR2(C),XR(b)
      • Refutation
        • P(a);
  • Actual
    • R(A);P_PINR(b)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(a)::R(A),XR(b)
      • R(b);N_SPINR(b),OGATE,XR(A)::QAR(C),XR(b)
      • R(b);OGATEB::R(A),XR(b)
      • P(a);::QAB(C)
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