MESON Chess Problem Database

Problem Display
PID: 234759 (k7/P1K5/2P5/n7/8/7R/8/7Q w - - 0 1)

Lincoln, Robert A

Kudesnik, 2015

k7/P1K5/2P5/n7/8/7R/8/7Q

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kb6?
      • threat
        • 2.Rh8#
      • 1...Sb7
        • 2.cxb7#
      • 1...Sc4+!
    • 1.Qa1?
      • 1...Kxa7
        • 2.Qxa5#
      • 1...Sb3
        • 2.Rh8#
      • 1...Sc4
        • 2.Rh8#
      • 1...Sb7
        • 2.cxb7#
      • 1...Sxc6!
    • 1.Qg1?
      • threat
        • 2.Rh8#
      • 1...Sb7
        • 2.cxb7#
      • 1...Sxc6!
  • Keys
    • 1.Ra3!
      • 1...Kxa7
        • 2.Rxa5#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qh8#
      • 1...Sc4
        • 2.Qh8#
      • 1...Sb7
        • 2.cxb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • R(B)
      • Vars
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINS(a),XP(D)::QAR2(A),XS(a)
        • S(a);::R(B)
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(A);
      • Threat
        • R(B)
      • Vars
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(a);XP(C)
  • Actual
    • R(B);
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINS(a),XP(D)::R(B),XS(a)
      • S(a);OGATE,P_SPINS(a),XP(C)::QAB(A),XS(a)
      • S(a);::QAB1(A)
      • S(a);OGATE::P(C),XS(a)
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