MESON Chess Problem Database

Problem Display
PID: 11680 (r3k2r/7n/2n5/4NN2/B7/8/8/1R2K1Q1 w qk - 0 1)

Stosic, Miroslav

Vecherni Novosti, 1970

r3k2r/7n/2n5/4NN2/B7/8/8/1R2K1Q1

#2

6 + 5

3310 2345 Chess Problems 1997
56 The Problemist 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Rb8#
    • 1...Ra6
      • 2.Rb8#
    • 1...Ra7
      • 2.Rb8#
    • 1...Rb8
      • 2.Rxb8#
  • Tries
    • 1.Bxc6+?
      • 1...Kf8
        • 2.Qg7#
      • 1...Kd8!
    • 1.Qg6+?
      • 1...Kf8
        • 2.Sd7#
        • 2.Qf7#
      • 1...Kd8!
    • 1.Qg7?
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qd7#
      • 1...0-0-0
        • 2.Qb7#
      • 1...Ra7
        • 2.Rb8#
      • 1...Rxa4!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qe7#
        • 2.Qxa8#
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qf7#
      • 1...0-0
        • 2.Qg7#
      • 1...0-0-0
        • 2.Qb7#
      • 1...Rxa7
        • 2.Rb8#
      • 1...Rb8
        • 2.Rxb8#
        • 2.Qxb8#
        • 2.Qe7#
      • 1...Rc8
        • 2.Qe7#
      • 1...Rd8
        • 2.Qe7#
        • 2.Qf7#

This anticipates 23941(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::R(A)
    • R(c);N_GUARD::R(A),XR(c)
  • Tries
    • Try
      • B(D);CHECK,XS(a)
      • Vars
        • K(d);P-FLIGHT::QAB1(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);N_SPINS(a),P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(d);N_SPINS(a),P-FLIGHT::QAR1(C)
        • K(d);0-0-0,N_SPINS(a),OGATEB::QAB1(C)
        • R(c);N_GUARD::R(A)
      • Refutation
        • R(c);N_SPINS(a),XB(D)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);N_SPINS(a),P-FLIGHT::QAR1(C)
      • K(d);0-0,N_SPINS(a),OGATEB::QAR1(C)
      • K(d);0-0-0,N_SPINS(a),OGATEB::QAB1(C)
      • R(c);N_GUARD,XQ(C)::R(A)
      • R(c);::QAR1(C)
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