MESON Chess Problem Database

Problem Display
PID: 259442 (rNnK3n/k4b1R/N2P4/pP6/P2r4/6Q1/6B1/6B1 w - - 0 1)

Cheylan, Yves

Probleemblad, 1972

rNnK3n/k4b1R/N2P4/pP6/P2r4/6Q1/6B1/6B1

#2

10 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kb6
      • 2.Bxd4#
    • 1...Sxd6
      • 2.Bxd4#
    • 1...Se7
      • 2.Bxd4#
  • Tries
    • 1.Kxc8?
      • threat
        • 2.Bxd4#
      • 1...Kb6
        • 2.Bxd4#
      • 1...Rxb8+!
    • 1.Rxf7+?
      • 1...Kb6
        • 2.Bxd4#
        • 2.Rb7#
      • 1...Se7
        • 2.Bxd4#
      • 1...Sxf7+!
    • 1.Qc3?
      • threat
        • 2.Qc7#
      • 1...Kb6
        • 2.Bxd4#
        • 2.Qxd4#
        • 2.Qc5#
        • 2.Qc7#
      • 1...Sxd6
        • 2.Bxd4#
        • 2.Qxd4#
        • 2.Qc5#
      • 1...Rxb8!
    • 1.Qf3?
      • threat
        • 2.Qb7#
      • 1...Kb6
        • 2.Bxd4#
        • 2.Qb7#
      • 1...Sxd6
        • 2.Bxd4#
      • 1...Rxb8!
    • 1.b6+?
      • 1...Kxb6
        • 2.Bxd4#
      • 1...Sxb6!
  • Keys
    • 1.d7!
      • threat
        • 2.Qc7#
      • 1...Kb6
        • 2.Bxd4#
        • 2.Qc7#
      • 1...Rxb8
        • 2.Qxb8#
      • 1...Bd5
        • 2.dxc8S#
      • 1...Sd6
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(c);N_SPINB(d),S_CUTS(f),S_FLIGHT::B(A),XR(a)
    • S(f);N_GUARD,P_PINS(I),XP(G)::B(A),XR(a)
    • S(f);N_GUARD,N_SPINB(d),P_PINS(I)::B(A),XR(a)
  • Tries
    • Try
      • K(J);N_SPINP(G),P-FLIGHT,P_SPINS(I),XS(f)
      • Threat
        • B(A),XR(a)
      • Vars
        • K(c);N_SPINB(d),S_FLIGHT::B(A),XR(a)
      • Refutation
        • R(e);CHECK,XS(I)
    • Try
      • R(H);CHECK,XB(d)
      • Vars
        • S(f);P_PINS(I),P_SPINS(f)::B(A),XR(a)
      • Refutation
        • S(g);CHECK,XR(H)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Refutation
        • R(e);XS(I)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(f);N_GUARD,P_PINS(I),XP(G)::B(A),XR(a)
      • Refutation
        • R(e);XS(I)
    • Try
      • P(E);CHECK,N_PINR(a)
      • Vars
        • K(c);N_SPINB(d),P_SPINR(a),S_CUTS(f),S_FLIGHT,XP(E)::B(A),XR(a)
      • Refutation
        • S(f);P_PINS(I),XP(E)
  • Actual
    • P(G);N_PINB(d)
    • Threat
      • QAR2(C)
    • Vars
      • R(e);OGATE,XS(I)::QAB1(C),XR(e)
      • B(d);N_PINP(G)::PXS(f)=S
      • S(f);N_GUARD,N_PINP(G),P_PINS(I)::B(A),XR(a)
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