MESON Chess Problem Database

Problem Display
PID: 235519 (2QK4/8/pR6/kp6/8/8/8/8 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Sem Shakhmatnikh not, 2013

2QK4/8/pR6/kp6/8/8/8/8

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb6
      • 2.Qc7#
    • 1...b4
      • 2.Qxa6#
  • Tries
    • 1.Qg4?
      • 1...b4
        • 2.Qxb4#
      • 1...Kxb6!
    • 1.Qc4?
      • 1...Kxb6
        • 2.Qc7#
      • 1...b4
        • 2.Rxa6#
        • 2.Qxa6#
        • 2.Qxb4#
      • 1...bxc4!
  • Keys
    • 1.Qc3+!
      • 1...Ka4
        • 2.Rxa6#
      • 1...Kxb6
        • 2.Qc7#
      • 1...b4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(B)
    • P(b);::QAR1(B),XP(c)
  • Tries
    • Try
      • Q(B);
      • Vars
        • P(b);::QAB1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(B)
      • Refutation
        • P(b);XQ(B)
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);P-FLIGHT::R(A),XP(c)
      • K(a);OGATEB,S_FLIGHT,XR(A)::QAB1(B)
      • P(b);P_SPINP(b)::QAB1(B),XP(b)
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