MESON Chess Problem Database

Problem Display
PID: 133812 (8/6p1/1BBNp1K1/2P5/2PP1P2/4kp1P/4p3/2N1Q3 w - - 0 1)

Kovalic, Jan

5th Prize, diagrammes, 1991

8/6p1/1BBNp1K1/2P5/2PP1P2/4kp1P/4p3/2N1Q3

#2

11 + 5

56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qd2#
  • Tries
    • 1.Kg5?
      • 1...Kxd4
        • 2.Qd2#
      • 1...f2
        • 2.Qc3#
      • 1...e5
        • 2.Sf5#
      • 1...g6!
    • 1.Sf5+?
      • 1...Kxf4
        • 2.Sd3#
        • 2.Qd2#
        • 2.Qg3#
        • 2.Qh4#
      • 1...exf5!
    • 1.Ba5?
      • 1...Kxd4
        • 2.Qf2#
      • 1...Kxf4
        • 2.Bd2#
      • 1...f2
        • 2.Qd2#
      • 1...e5!
    • 1.Qc3+?
      • 1...Kxf4
        • 2.Qxf3#
      • 1...Kf2!
    • 1.Qxe2+?
      • 1...Kxd4
        • 2.Sb5#
        • 2.Qd3#
        • 2.Qd2#
        • 2.Qe5#
      • 1...Kxf4
        • 2.Qxf3#
        • 2.Qe5#
      • 1...fxe2!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qd2#
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kxf4
        • 2.Qd2#
      • 1...f2
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT,XP(E)::QAR2(B)
  • Tries
    • Try
      • K(K);P-FLIGHT
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XP(E)::QAR2(B)
        • P(c);SBLOCK::QAR2(B)
        • P(d);N_GUARD::S(J)
      • Refutation
        • P(e);
    • Try
      • S(J);CHECK
      • Refutation
        • P(d);XS(J)
    • Try
      • B(H);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XP(E)::QAB(B)
        • K(b);N_SPINP(a),S_FLIGHT,XP(F)::B(H)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT,XP(F)::QAR1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK,XP(a)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • S(J);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT,XP(E)::QAB1(B)
      • K(b);N_SPINP(a),S_FLIGHT,XP(F)::QAB(B)
      • P(c);::QAB1(B),XP(c)
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