MESON Chess Problem Database

Problem Display
PID: 221695 (q3r3/b2P4/3p1Np1/N2PkpK1/2Rpb2R/2p3P1/5B2/4r2Q w - - 0 1)

Sigurov, Aleksandr Ilich

SuperProblem, 2018

q3r3/b2P4/3p1Np1/N2PkpK1/2Rpb2R/2p3P1/5B2/4r2Q

#2

10 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qb8
      • 2.Sc6#
    • 1...Qd8
      • 2.Sc6#
    • 1...Bb8
      • 2.Bxd4#
      • 2.dxe8Q#
      • 2.dxe8R#
    • 1...f4
      • 2.gxf4#
  • Tries
    • 1.Rc6?
      • threat
        • 2.Sc4#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Bd3!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Sc4#
      • 1...Qxd5
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Bxd5
        • 2.Qxe1#
      • 1...Bd3
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(j);N_GUARD::S(F),XQ(j)
    • Q(j);N_GUARD::S(F)
    • Q(j);N_GUARD,P_PINS(I)::S(F)
    • P(f);OGATE::P(C),XP(f)
  • Tries
    • Try
      • R(D);
      • Threat
        • S(F)
      • Vars
        • Q(j);XR(D)::S(F),XQ(j)
        • B(d);OGATE,XP(G)::QAR1(A),XB(d)
      • Refutation
        • B(d);
  • Actual
    • R(D);
    • Threat
      • S(F)
    • Vars
      • Q(j);N_GUARD,P_SPINQ(j),XP(G)::PXR(k)=Q
      • B(d);OGATEB,P_SPINB(d),XP(G)::QAR(A),XR(a)
      • B(d);::B(B),XP(c)
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