MESON Chess Problem Database

Problem Display
PID: 245493 (6b1/8/1Q6/8/8/8/B1k5/R3K3 w - - 0 1)

Shumarin, Vladimir Pavlovich

Kudesnik, 2001

6b1/8/1Q6/8/8/8/B1k5/R3K3

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.Qxb3#
    • 1...Bh7
      • 2.Qb3#
  • Tries
    • 1.Bb1+?
      • 1...Kc1
        • 2.Bd3#
        • 2.Be4#
        • 2.Bf5#
        • 2.Bg6#
        • 2.Bh7#
      • 1...Kc3!
    • 1.Bc4?
      • threat
        • 2.Qb3#
      • 1...Kc3
        • 2.Rc1#
      • 1...Bxc4!
    • 1.Qf2+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kd3!
    • 1.Qe3?
      • threat
        • 2.Qd2#
      • 1...Kb2
        • 2.Qc1#
      • 1...Bxa2!
    • 1.Qc5+?
      • 1...Kb2
        • 2.Qc1#
      • 1...Kd3
        • 2.Bb1#
      • 1...Bc4!
  • Keys
    • 1.Rc1+!
      • 1...Kxc1
        • 2.Qb1#
      • 1...Kd3
        • 2.Bb1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAB1(D),XB(b)
    • B(b);N_GUARD::QAB1(D)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(C);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • B(b);XB(C)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • B(b);XB(C)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(D)
        • K(a);S_FLIGHT::B(C)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • R(A);CHECK
    • Vars
      • K(a);P-FLIGHT,XR(A)::QAR1(D)
      • K(a);S_FLIGHT::B(C)
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