MESON Chess Problem Database

Problem Display
PID: 234686 (8/1p6/1b4R1/1kP5/8/1K6/1Q6/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2011

8/1p6/1b4R1/1kP5/8/1K6/1Q6/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qe5#
  • Tries
    • 1.Rxb6+?
      • 1...Ka5
        • 2.Qa1#
        • 2.Qa3#
        • 2.Qc3#
        • 2.Qa2#
        • 2.Qd2#
      • 1...Kxc5!
    • 1.Qa3?
      • threat
        • 2.Rxb6#
      • 1...Bxc5
        • 2.Qa4#
      • 1...Ba7
        • 2.Qb4#
      • 1...Bc7
        • 2.Qb4#
      • 1...Bd8
        • 2.Qb4#
      • 1...Ba5!
    • 1.Qe2+?
      • 1...Kxc5
        • 2.Qc4#
        • 2.Qe5#
      • 1...Ka5!
  • Keys
    • 1.Qd4!
      • 1...Ka5
        • 2.Qa4#
      • 1...Ka6
        • 2.Qa4#
      • 1...Bxc5
        • 2.Qa4#
      • 1...Ba5
        • 2.Qc4#
      • 1...Ba7
        • 2.Qb4#
      • 1...Bc7
        • 2.Qb4#
      • 1...Bd8
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
  • Tries
    • Try
      • R(D);CHECK,XB(b)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • Q(A);
      • Threat
        • R1(D),XB(b)
      • Vars
        • B(b);SBLOCK,XP(C)::QAB1(A)
        • B(b);::QAR1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);P_SPINB(b),S_FLIGHT::QAR2(A)
      • B(b);SBLOCK,XP(C)::QAB1(A)
      • B(b);SBLOCK::QAB1(A)
      • B(b);::QAR1(A)
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