MESON Chess Problem Database

Problem Display
PID: 275913 (3K4/3Q2pB/3p2rr/1p1k4/1P4P1/2p1P1B1/2N2n2/2N2q2 w - - 0 1)

Delobel, Bernard

Phenix, 2002

3K4/3Q2pB/3p2rr/1p1k4/1P4P1/2p1P1B1/2N2n2/2N2q2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qc6#
    • 1...Ke4
      • 2.Qf5#
  • Tries
    • 1.Bg8+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Re6!
    • 1.Qxb5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Qxb5!
    • 1.Qxd6+?
      • 1...Kc4
        • 2.Sa3#
        • 2.Qc5#
        • 2.Qd4#
      • 1...Ke4
        • 2.Qc6#
      • 1...Rxd6+!
    • 1.Qb7+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Ke6!
    • 1.e4+?
      • 1...Kc4
        • 2.Qc6#
        • 2.Qc8#
        • 2.Qc7#
      • 1...Kxe4
        • 2.Qf5#
      • 1...Sxe4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qc6#
      • 1...Kc4
        • 2.Qxb5#
      • 1...Ke4
        • 2.Qe6#
      • 1...Qc4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);N_GUARD,N_SPINP(f),S_FLIGHT::QAR2(G)
    • K(e);N_GUARD,N_SPINP(f),P_SPINR(g),S_FLIGHT::QAB1(G)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(e);N_GUARD,N_SPINP(f),S_FLIGHT::QAB1(G)
      • Refutation
        • R(g);P_SPINR(g)
    • Try
      • Q(G);CHECK,N_PINP(f),XP(d)
      • Vars
        • K(e);OGATE,P_SPINR(g),S_FLIGHT::QAB1(G)
        • K(e);OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • Q(a);XQ(G)
    • Try
      • Q(G);CHECK,XP(f)
      • Vars
        • K(e);N_GUARD,P_SPINR(g),S_FLIGHT::QAB(G)
      • Refutation
        • R(g);CHECK,XQ(G)
    • Try
      • Q(G);CHECK,N_PINP(f)
      • Vars
        • K(e);N_GUARD,S_FLIGHT::QAR2(G)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(e);N_GUARD,N_SPINP(f),P_SPINR(g),S_FLIGHT,XP(C)::QAB1(G)
      • Refutation
        • S(b);XP(C)
  • Actual
    • S(B);
    • Threat
      • QAB1(G)
    • Vars
      • K(e);N_GUARD,N_SPINP(f),S_CUTQ(a),S_FLIGHT::QAB1(G),XP(d)
      • K(e);N_SPINP(f),P_SPINR(g),S_FLIGHT::QAR2(G)
      • Q(a);SBLOCK::QAR2(G)
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