MESON Chess Problem Database

Problem Display
PID: 235073 (8/2p1p3/5pK1/1Q1pNP1B/4k3/2PNPRp1/nPr1b2b/5n2 w - - 0 1)

Shanshin, Valery Yurevich

Hlas l'udu, 1986

8/2p1p3/5pK1/1Q1pNP1B/4k3/2PNPRp1/nPr1b2b/5n2

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe3
      • 2.Rf4#
    • 1...d4
      • 2.Qc6#
    • 1...fxe5
      • 2.Sc5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sc5#
      • 1...Kxd3
        • 2.Qxd5#
      • 1...Bxd3
        • 2.Rf4#
      • 1...dxc4
        • 2.Qxc4#
      • 1...c5
        • 2.Sxc5#
      • 1...d4!
    • 1.Qa4+?
      • 1...d4
        • 2.Qc6#
        • 2.Qxd4#
      • 1...Sb4!
    • 1.Qc4+?
      • 1...d4
        • 2.Qxd4#
        • 2.Qc6#
      • 1...dxc4!
    • 1.Qb4+?
      • 1...d4
        • 2.Qxd4#
      • 1...Sxb4!
    • 1.Qc5?
      • threat
        • 2.Rf4#
        • 2.Qd4#
      • 1...Bxd3
        • 2.Qd4#
      • 1...Bxf3
        • 2.Bxf3#
        • 2.Qd4#
      • 1...g2
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
        • 2.Qc6#
      • 1...fxe5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Rf4#
      • 1...Kxf3
        • 2.Qxd5#
      • 1...Bxf3
        • 2.Sc5#
      • 1...g2
        • 2.Sgf2#
      • 1...e5
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(a);SBLOCK,XP(D)::R1(E)
    • P(h);OGATEB::QAB(F)
    • P(i);SBLOCK,XS(G)::S(C)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(C)
      • Vars
        • K(g);S_FLIGHT,XS(C)::QAR2(F),XP(h)
        • B(d);SBLOCK,XS(C)::R1(E)
        • P(h);OGATE,XS(G)::QAR2(F),XP(h)
        • P(j);::S(C),XP(j)
      • Refutation
        • P(h);
    • Try
      • Q(F);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(F);CHECK
      • Refutation
        • P(h);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • P(h);P_SPINP(h)::QAR1(F),XP(h)
      • Refutation
        • S(b);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XS(C)::QAR1(F)
        • P(f);::QAR1(F)
      • Refutation
        • P(i);XS(G)
  • Actual
    • S(G);
    • Threat
      • R1(E)
    • Vars
      • K(g);S_FLIGHT,XR(E)::QAB(F),XP(h)
      • B(d);SBLOCK,XR(E)::S(C)
      • P(f);N_GUARD::S(G)
      • P(k);N_GUARD::S(G),XP(i)
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