MESON Chess Problem Database

Problem Display
PID: 147318 (2rR4/2Q5/3q4/7K/RBPk4/8/2B2P1b/8 w - - 0 1)

Vasilenko, Anatoly Grigorovich

Canadian Chess Chat, 1984

2rR4/2Q5/3q4/7K/RBPk4/8/2B2P1b/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qxd6#
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Ra8
      • 2.Qc5#
    • 1...Rb8
      • 2.Qc5#
  • Tries
    • 1.Bc5+?
      • 1...Ke5
        • 2.Qxd6#
      • 1...Kc3!
    • 1.Ra3?
      • threat
        • 2.Bc3#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Ke5
        • 2.Qxd6#
      • 1...Rxc7!
    • 1.Qb6+?
      • 1...Ke5
        • 2.Qxd6#
      • 1...Rc5+
        • 2.Qxc5#
      • 1...Kxc4!
    • 1.Qxd6+?
      • 1...Kxc4
        • 2.Qd3#
        • 2.Qd5#
        • 2.Qa6#
      • 1...Bxd6!
    • 1.Qc6?
      • threat
        • 2.Qe4#
      • 1...Qd5+
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Ke5
        • 2.Qxd6#
      • 1...Rxc6!
    • 1.Qxc8?
      • threat
        • 2.Qc5#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Ke5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Bc3#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Rc5+
        • 2.Qxc5#
      • 1...Kxc4
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(b);S_FLIGHT::QAB1(G),XQ(c)
    • Q(c);CHECK,OGATE::R1(H),XQ(c)
    • R(d);N_GUARD::QAB1(G)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(G),XQ(c)
      • Refutation
        • K(b);N_SPINQ(c),S_FLIGHT
    • Try
      • R(C);
      • Threat
        • B(D)
      • Vars
        • Q(c);CHECK,OGATE::R1(H),XQ(c)
        • K(b);S_FLIGHT::QAB1(G),XQ(c)
      • Refutation
        • R(d);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);N_SPINQ(c),S_FLIGHT::QAB1(G),XQ(c)
        • R(d);CHECK,N_GUARD,P_SPINR(d)::QAB1(G),XR(d)
      • Refutation
        • K(b);N_SPINQ(c),P-FLIGHT,XP(E)
    • Try
      • Q(G);CHECK,XQ(c)
      • Refutation
        • B(a);P_SPINB(a),XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);N_SPINQ(c),S_FLIGHT::QAB1(G),XQ(c)
      • Refutation
        • R(d);XQ(G)
    • Try
      • Q(G);XR(d)
      • Threat
        • QAB1(G)
      • Vars
        • Q(c);CHECK,OGATE::R1(H),XQ(c)
      • Refutation
        • K(b);N_SPINQ(c),S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • B(D)
    • Vars
      • Q(c);CHECK,N_GUARD::QAR1(G),XQ(c)
      • R(d);CHECK,N_GUARD::QAB1(G),XR(d)
      • K(b);N_SPINQ(c),OGATEB,P-FLIGHT,XP(E)::R(C)+B(D),XQ(c)
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