MESON Chess Problem Database

Problem Display
PID: 250660 (4n3/1b4PQ/4pp1B/3p2R1/R3q2k/4P3/5KP1/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

Schweizerische Schachzeitung, 1998

4n3/1b4PQ/4pp1B/3p2R1/R3q2k/4P3/5KP1/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qf4+
      • 2.Rxf4#
    • 1...Qg4
      • 2.Raxg4#
  • Tries
    • 1.Rg3?
      • threat
        • 2.Bg5#
      • 1...Qf4+
        • 2.Bxf4#
      • 1...Qg4
        • 2.Rh3#
      • 1...Kh5!
    • 1.Rh5+?
      • 1...Kg4
        • 2.Qg6#
      • 1...Kxh5!
    • 1.Qf5?
      • threat
        • 2.Rh5#
        • 2.Qh3#
        • 2.g3#
      • 1...Qf4+
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Sxg7
        • 2.Qh3#
        • 2.g3#
      • 1...fxg5
        • 2.Qh3#
        • 2.Qxg5#
      • 1...Qg4
        • 2.Raxg4#
        • 2.Rgxg4#
        • 2.Rh5#
        • 2.Qxg4#
      • 1...exf5!
    • 1.Qg6?
      • threat
        • 2.Rh5#
        • 2.Qh5#
      • 1...Qf4+
        • 2.Rxf4#
      • 1...fxg5
        • 2.Qxg5#
      • 1...Sxg7!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Bf4#
      • 1...Qf4+
        • 2.Bxf4#
      • 1...Kh5
        • 2.Bf4#
      • 1...Sxg7
        • 2.Bxg7#
      • 1...Qg4
        • 2.Bg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);OGATEB,P_PINP(C)::R(D),XQ(a)
    • Q(a);CHECK,OGATE::R(D),XQ(a)
    • Q(a);OGATE::R1(D),XQ(a)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAR(H)+B(F),DCHECK
      • Vars
        • Q(a);CHECK,N_GUARD::QAR(H)+B(F),XQ(a)
        • Q(a);::R1(E)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT,XR(E)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Refutation
        • P(d);XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATE::R(D),XQ(a)
        • P(e);OGATE,XR(E)::QAB1(H),XP(e)
      • Refutation
        • S(g);XP(G)
  • Actual
    • R(E);
    • Threat
      • QAR(H)+B(F)
    • Vars
      • Q(a);CHECK::QAR(H)+B(F),XQ(a)
      • K(b);N_SPINQ(a),P-FLIGHT::QAR(H)+B(F)
      • S(g);OGATE,XP(G)::QAR(H)+B(F),XS(g)
      • Q(a);::QAR(H)+B(F),DCHECK
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