MESON Chess Problem Database

Problem Display
PID: 239786 (2B5/2r5/5RP1/N2nk1P1/bpQrpN2/2R2nP1/3P4/B1K5 w - - 0 1)

Cheylan, Yves

Themes-64, 1974

2B5/2r5/5RP1/N2nk1P1/bpQrpN2/2R2nP1/3P4/B1K5

#2

12 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc3
      • 2.Qe6#
    • 1...Se3
      • 2.Qe6#
    • 1...Sxf4
      • 2.gxf4#
    • 1...Sb6
      • 2.Qe6#
    • 1...Sxf6
      • 2.Qe6#
    • 1...Se7
      • 2.Qe6#
  • Tries
    • 1.Qxd4+?
      • 1...Kxd4
        • 2.Rc4#
      • 1...Sxd4!
  • Keys
    • 1.Re3!
      • threat
        • 2.Sd3#
      • 1...Rxc4+
        • 2.Sxc4#
      • 1...Sxg5
        • 2.Bxd4#
      • 1...Sxe3
        • 2.Qxc7#
      • 1...Sxf4
        • 2.gxf4#
      • 1...Sxf6
        • 2.Qxc7#
      • 1...Bc2
        • 2.Qxd5#
      • 1...Se1
        • 2.Bxd4#
      • 1...Sc3
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(f);OGATE,XR(D)::QAR1(F)
    • S(f);OGATE::QAR1(F)
    • S(f);OGATE,XS(G)::P(E),XS(f)
    • S(f);OGATE,XR(J)::QAR1(F)
  • Tries
    • Try
      • Q(F);CHECK,P_SPINR(D),XR(d)
      • Vars
        • K(g);S_FLIGHT,XQ(F)::B(A)+R(D),DCHECK
      • Refutation
        • S(a);XQ(F)
  • Actual
    • R(D);P_PINP(e),P_PINR(d),P_SPINQ(F)
    • Threat
      • S(G)
    • Vars
      • R(h);CHECK,XQ(F)::S(H),XR(h)
      • S(a);N_GUARD,XP(I)::B(A),XR(d)
      • S(f);N_GUARD,N_SPINP(e),XR(D)::QAB(F),XR(h)
      • S(f);OGATE,XS(G)::P(E),XS(f)
      • S(f);N_GUARD,XR(J)::QAB(F),XR(h)
      • B(b);N_PINQ(F)::QAR1(F),XS(f)
      • S(a);N_GUARD::B(A),XR(d)
      • S(f);N_PINQ(F),N_SPINR(d)::QAR1(F)
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