MESON Chess Problem Database

Problem Display
PID: 259479 (2br2n1/1P1kPPK1/3p4/3P4/1p6/2n1Q3/4p3/2R5 w - - 0 1)

Cheylan, Yves

Problemas, 1992

2br2n1/1P1kPPK1/3p4/3P4/1p6/2n1Q3/4p3/2R5

#2

7 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qe6#
      • 2.b8S#
    • 1...Sd1
      • 2.Qe6#
      • 2.b8S#
    • 1...Sa2
      • 2.Qe6#
      • 2.b8S#
    • 1...Sa4
      • 2.Qe6#
      • 2.b8S#
    • 1...Sb5
      • 2.Qe6#
      • 2.b8S#
    • 1...Sxd5
      • 2.b8S#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.Qe6#
        • 2.b8S#
      • 1...Bxb7
        • 2.Qe6#
      • 1...e1Q
        • 2.b8S#
      • 1...e1R
        • 2.b8S#
      • 1...bxc3!
    • 1.exd8R+?
      • 1...Kc7
        • 2.bxc8Q#
      • 1...Kxd8!
    • 1.e8S?
      • threat
        • 2.Qe6#
        • 2.b8S#
        • 2.f8S#
      • 1...Bxb7
        • 2.Qe6#
      • 1...Sxd5
        • 2.b8S#
        • 2.f8S#
      • 1...Se4
        • 2.Rc7#
      • 1...e1Q
        • 2.b8S#
        • 2.f8S#
      • 1...e1R
        • 2.b8S#
        • 2.f8S#
      • 1...Se7
        • 2.Qe6#
        • 2.b8S#
      • 1...Rxe8!
  • Keys
    • 1.Qa7!
      • threat
        • 2.b8S#
      • 1...Kc7
        • 2.b8Q#
        • 2.b8B#
      • 1...Kxe7
        • 2.bxc8S#
      • 1...Bxb7
        • 2.Qxb7#
      • 1...Sxd5
        • 2.bxc8Q#
        • 2.bxc8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(b);XP(C)::P=S
  • Tries
    • Try
      • R(A);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XP(D)::QAB1(B)
        • P(a);::P=S
      • Refutation
        • P(c);XR(A)
    • Try
      • P(E);CHECK,XR(g)
      • Vars
        • K(e);P-FLIGHT,P_SPINS(b)::PXB(f)=Q
      • Refutation
        • K(e);P-FLIGHT,XR(E)
    • Try
      • P(E);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);XP(D)::QAB1(B)
        • S(b);OGATE::R1(A)
      • Refutation
        • R(g);XS(E)
  • Actual
    • Q(B);
    • Threat
      • P=S
    • Vars
      • K(e);P-FLIGHT,P_SPINS(b)::P=Q
      • K(e);N_GUARD,P-FLIGHT,XP(E)::PXB(f)=S
      • B(f);OGATE,P_SPINB(f),XP(D)::QAR2(B),XB(f)
      • S(b);XP(C)::PXB(f)=Q
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