MESON Chess Problem Database

Problem Display
PID: 214273 (8/8/8/2p5/2K5/k7/8/r1b1Q2B w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1973

8/8/8/2p5/2K5/k7/8/r1b1Q2B

#2

3 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qa5#
    • 1...Bd2
      • 2.Qxa1#
    • 1...Be3
      • 2.Qxa1#
    • 1...Bf4
      • 2.Qxa1#
    • 1...Bg5
      • 2.Qxa1#
    • 1...Bh6
      • 2.Qxa1#
  • Tries
    • 1.Qb4+?
      • 1...Ka2
        • 2.Qb3#
      • 1...cxb4!
    • 1.Qd1?
      • threat
        • 2.Qb3#
      • 1...Ka2
        • 2.Qb3#
      • 1...Kb2
        • 2.Qb3#
      • 1...Rb1!
  • Keys
    • 1.Qc3+!
      • 1...Ka2
        • 2.Qb3#
      • 1...Ka4
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(b);SBLOCK::QAR2(A)
    • B(b);OGATE::QAR2(A),XR(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • R(a);
  • Actual
    • Q(A);CHECK
    • Vars
      • K(c);P-FLIGHT::QAB1(A)
      • K(c);P-FLIGHT::B(B)
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