MESON Chess Problem Database

Problem Display
PID: 244336 (4B2b/KRp4b/p7/2pN4/2k2P2/1p1R4/1PP1r3/6Q1 w - - 0 1)

Shanshin, Valery Yurevich

Shakhmatnaya kompozitsiya, 1993

4B2b/KRp4b/p7/2pN4/2k2P2/1p1R4/1PP1r3/6Q1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Se3#
    • 1...Rf2
      • 2.Se3#
    • 1...Rg2
      • 2.Se3#
    • 1...Rh2
      • 2.Se3#
    • 1...Re3
      • 2.Sxe3#
    • 1...a5
      • 2.Bb5#
  • Tries
    • 1.Bf7?
      • threat
        • 2.Se3#
      • 1...Rxc2
        • 2.Sb4#
      • 1...Bxd3
        • 2.cxb3#
      • 1...Re3
        • 2.Sxe3#
      • 1...bxc2!
    • 1.Qd1?
      • threat
        • 2.cxb3#
      • 1...Rxc2
        • 2.Se3#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...bxc2
        • 2.b3#
      • 1...Rd2
        • 2.Se3#
      • 1...Bd4!
  • Keys
    • 1.Sb4!
      • threat
        • 2.cxb3#
      • 1...Rxc2
        • 2.Bf7#
      • 1...Bxd3
        • 2.cxd3#
      • 1...bxc2
        • 2.b3#
      • 1...cxb4
        • 2.Rxc7#
      • 1...Bc3
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::S(F)
    • R(a);N_GUARD::S(F),XR(a)
    • P(e);N_GUARD::B(I)
  • Tries
    • Try
      • B(I);
      • Threat
        • B(I)+S(F),DCHECK
      • Vars
        • R(a);N_GUARD,XP(C)::B(I)+S(F)
        • B(g);SBLOCK,XR(D)::P(C),XP(b)
        • R(a);::B(I)+S(F),DCHECK,XR(a)
      • Refutation
        • P(b);XP(C)
    • Try
      • Q(A);
      • Threat
        • P(C),XP(b)
      • Vars
        • R(a);N_GUARD,XP(C)::S(F)
        • B(g);OGATE,XR(D)::QAB1(A),XB(g)
        • P(b);OGATE,XP(C)::P(B)
        • R(a);N_GUARD::S(F)
      • Refutation
        • B(h);
  • Actual
    • S(F);
    • Threat
      • P(C),XP(b)
    • Vars
      • R(a);N_GUARD,XP(C)::B(I)
      • B(g);OGATE,XR(D)::P(C),XB(g)
      • P(b);OGATE,XP(C)::P(B)
      • P(d);OGATEB,SBLOCK,XS(F)::R(H),XP(f)
      • B(h);N_GUARD::R1(D),XB(h)
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