MESON Chess Problem Database

Problem Display
PID: 276114 (6B1/1Qp2K2/2p1P2R/3PP3/2k5/1Np5/P4N2/4B3 w - - 0 1)

Cheylan, Yves

Mat, 1981

6B1/1Qp2K2/2p1P2R/3PP3/2k5/1Np5/P4N2/4B3

#2

11 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qxc6#
    • 1...c5
      • 2.Rh4#
  • Tries
    • 1.Kf6?
      • 1...Kxd5
        • 2.e7#
      • 1...c2
        • 2.Qxc6#
      • 1...c5
        • 2.Rh4#
      • 1...cxd5!
    • 1.Bh7?
      • 1...cxd5
        • 2.Bd3#
      • 1...c2
        • 2.Qxc6#
      • 1...c5
        • 2.Bd3#
        • 2.Rh4#
      • 1...Kxd5!
    • 1.Rh3?
      • 1...cxd5
        • 2.Rxc3#
      • 1...c2
        • 2.Qxc6#
      • 1...c5
        • 2.Rxc3#
        • 2.Rh4#
      • 1...Kxd5!
    • 1.Qa6+?
      • 1...Kb4
        • 2.Sd3#
        • 2.Rh4#
      • 1...Kxd5!
    • 1.Qb4+?
      • 1...Kxd5
        • 2.Qc5#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Kxb4!
    • 1.Qb6?
      • threat
        • 2.Qc5#
      • 1...Kxd5
        • 2.Qd4#
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...cxb6!
    • 1.dxc6?
      • 1...Kd5
        • 2.Qb5#
      • 1...c2!
  • Keys
    • 1.e7!
      • 1...Kxd5
        • 2.Kf6#
      • 1...cxd5
        • 2.Rc6#
      • 1...c2
        • 2.Qxc6#
      • 1...c5
        • 2.Rh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);::QAR2(I),XP(c)
    • P(c);::R(H)
  • Tries
    • Try
      • K(J);P-FLIGHT
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT,XP(E)::B(K)+P(G)
        • P(a);::QAR2(I),XP(c)
        • P(c);::R(H)
      • Refutation
        • P(c);XP(E)
    • Try
      • B(K);
      • Vars
        • P(c);XP(E)::B(K)
        • P(a);::QAR2(I),XP(c)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT,XP(E)
    • Try
      • R(H);
      • Vars
        • P(c);XP(E)::R1(H),XP(a)
        • P(a);::QAR2(I),XP(c)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT,XP(E)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a),XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • P(c);::QAR1(I),XP(c)
      • Refutation
        • P(d);XQ(I)
    • Try
      • P(E);XP(c)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR2(I)
      • Refutation
        • P(a);
  • Actual
    • P(G);
    • Vars
      • K(b);P_SPINP(c),S_FLIGHT,XP(E)::B(K)+K(J)
      • P(c);SBLOCK,XP(E)::R(H)
      • P(a);::QAR2(I),XP(c)
      • P(c);::R(H)
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