MESON Chess Problem Database

Problem Display
PID: 146327 (8/8/8/8/8/7Q/b1k5/1R2K2R w K - 0 1)

Marjanovic, Dragoslav

Politika, 2011

(First published on Mon Nov 21 2011)

8/8/8/8/8/7Q/b1k5/1R2K2R

#2

4 + 2

56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.Qxb3#
  • Tries
    • 1.Rc1+?
      • 1...Kb2
        • 2.Qc3#
      • 1...Kxc1!
    • 1.Rb2+?
      • 1...Kc1
        • 2.Qc3#
      • 1...Kxb2!
    • 1.Rb3?
      • threat
        • 2.Qc3#
      • 1...Kc1
        • 2.Qc8#
        • 2.Qc3#
      • 1...Bxb3!
    • 1.Qc3+?
      • 1...Kxb1
        • 2.Kd2#
        • 2.Ke2#
        • 2.Kf2#
        • 2.0-0#
      • 1...Kxc3!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Rc1#
      • 1...Kxb1
        • 2.Kd2#
      • 1...Bxb1
        • 2.Rh2#
      • 1...Bb3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(D),XB(a)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT,XR(A)
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(D)
      • Refutation
        • K(b);P-FLIGHT,XR(A)
    • Try
      • R(A);
      • Threat
        • QAR1(D)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • R1(A)
    • Vars
      • K(b);S_FLIGHT,XR(A)::R(C)+K(B)
      • B(a);SBLOCK,XR(A)::R(C)
      • B(a);N_GUARD::QAB1(D),XB(a)
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