MESON Chess Problem Database

Problem Display
PID: 259490 (2n5/2Qp4/8/2BkP1N1/3p1r2/1K2b3/3P2N1/3R2r1 w - - 0 1)

Cheylan, Yves

Buletin Problemistic, 1984

2n5/2Qp4/8/2BkP1N1/3p1r2/1K2b3/3P2N1/3R2r1

#2

8 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Sxf4#
    • 1...Sb6
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qd6#
    • 1...Se7
      • 2.Qd6#
    • 1...d3
      • 2.Sxe3#
  • Tries
    • 1.Bb6?
      • threat
        • 2.Qc5#
      • 1...Sxb6
        • 2.Qd6#
      • 1...d3
        • 2.Sxe3#
      • 1...d6!
    • 1.Bd6?
      • threat
        • 2.Qc4#
        • 2.Qc5#
        • 2.Qb7#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Sb6
        • 2.Qc5#
        • 2.Qb7#
      • 1...Sa7
        • 2.Qc4#
        • 2.Qc5#
      • 1...Se7
        • 2.Qc4#
        • 2.Qc5#
      • 1...d3!
    • 1.Ba7?
      • threat
        • 2.Qc5#
      • 1...Sxa7
        • 2.Qd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...d3
        • 2.Sxe3#
      • 1...d6!
    • 1.Qxd7+?
      • 1...Kxe5
        • 2.Qe6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kxc5!
  • Keys
    • 1.Bxd4!
      • threat
        • 2.Qc4#
        • 2.Qc5#
      • 1...Kxd4
        • 2.dxe3#
      • 1...Rxd4
        • 2.Sxe3#
      • 1...Bxd4
        • 2.Sxf4#
      • 1...Sb6
        • 2.Qd6#
        • 2.Qc5#
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qc5#
      • 1...d6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • B(b);N_GUARD::S(C),XR(d)
    • S(g);N_GUARD::QAR1(H)
    • S(g);N_GUARD::QAR1(H),XS(g)
    • P(c);N_GUARD::S(C),XB(b)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR1(H)
      • Vars
        • S(g);N_GUARD,XB(E)::QAR1(H)
        • P(c);N_GUARD::S(C),XB(b)
      • Refutation
        • P(f);
    • Try
      • B(E);
      • Threat
        • DUALS(3)
      • Vars
        • S(g);OGATE,XB(E)::QAR1(H),XS(g)
      • Refutation
        • P(c);
    • Try
      • B(E);
      • Threat
        • QAR1(H)
      • Vars
        • S(g);N_GUARD,XB(E)::QAR1(H)
        • S(g);N_GUARD::QAR1(H)
        • P(c);N_GUARD::S(C),XB(b)
      • Refutation
        • P(f);
    • Try
      • Q(H);CHECK,XP(f)
      • Vars
        • K(e);N_GUARD,P-FLIGHT,XP(F)::QAR1(H)
        • S(g);N_GUARD,P_SPINS(g)::QAR1(H),XS(g)
      • Refutation
        • K(e);P-FLIGHT,XB(E)
  • Actual
    • B(E);XP(c)
    • Threat
      • DUALS(2)
    • Vars
      • K(e);P-FLIGHT,XB(E)::R(A)+P(B)DCHECK,XB(b)
      • R(d);SBLOCK,XB(E)::S(C),XB(b)
      • B(b);N_GUARD,SBLOCK,XB(E)::S(C),XR(d)
      • P(f);::QAB1(H)
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