MESON Chess Problem Database

Problem Display
PID: 219174 (2B5/B7/8/2pk4/8/4Q3/8/K7 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1976

2B5/B7/8/2pk4/8/4Q3/8/K7

#2

4 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxc5#
    • 1...Kd6
      • 2.Qxc5#
    • 1...c4
      • 2.Qe6#
  • Tries
    • 1.Kb1?
      • 1...Kc6
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
      • 1...c4
        • 2.Qe6#
      • 1...Kc4!
    • 1.Ka2?
      • 1...Kc6
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
      • 1...c4
        • 2.Qe6#
      • 1...Kc4!
    • 1.Kb2?
      • 1...Kc6
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
      • 1...c4
        • 2.Qe6#
      • 1...Kc4!
    • 1.Bb6?
      • 1...Kc6
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
        • 2.Qe6#
      • 1...c4
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Ke5!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Bb8#
      • 1...Kxe4!
  • Keys
    • 1.Qxc5+!
      • 1...Ke4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(b);S_FLIGHT::QAR1(B),XP(a)
    • K(b);P-FLIGHT::QAB1(B),XP(a)
    • P(a);SBLOCK::QAB1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B),XP(a)
        • K(b);P-FLIGHT::QAB1(B),XP(a)
        • P(a);SBLOCK::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B),XP(a)
        • K(b);P-FLIGHT::QAB1(B),XP(a)
        • P(a);SBLOCK::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR1(B),XP(a)
        • K(b);P-FLIGHT::QAB1(B),XP(a)
        • P(a);SBLOCK::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT::QAR1(B),XP(a)
        • P(a);SBLOCK::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::B(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);CHECK,XP(a)
    • Vars
      • K(b);OGATE,S_FLIGHT::QAB1(B)
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