MESON Chess Problem Database

Problem Display
PID: 158395 (2b5/3BK3/3P4/1PpR2pQ/R1N1kp2/4N3/2P1p1pB/1n1r1r2 w - - 0 1)

Shanshin, Valery Yurevich

1st Prize, Chepizhni-80 JT, 2015

2b5/3BK3/3P4/1PpR2pQ/R1N1kp2/4N3/2P1p1pB/1n1r1r2

#2

11 + 10

56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.cxd3#
    • 1...Rd4
      • 2.Re5#
    • 1...Rf3
      • 2.Qg6#
      • 2.Qh7#
    • 1...Ba6
      • 2.Bf5#
    • 1...Bb7
      • 2.Bf5#
    • 1...f3
      • 2.Qg4#
      • 2.Qg6#
      • 2.Qh7#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Bc6#
      • 1...Rxd5
        • 2.Qxe2#
      • 1...g4!
    • 1.Qxe2?
      • threat
        • 2.Sd2#
      • 1...Rxd5
        • 2.Sf5#
      • 1...Rd4
        • 2.Re5#
      • 1...Rd2
        • 2.Sxd2#
      • 1...Sd2
        • 2.Sxd2#
      • 1...fxe3!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...Kf3
        • 2.Sce5#
      • 1...Kxd5
        • 2.Sb6#
      • 1...Rxd5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(b);OGATE::P(A),XR(b)
    • R(b);SBLOCK::R1(G)
    • B(j);N_GUARD::B(J)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(G)
      • Vars
        • K(f);OGATEB,S_FLIGHT,XR(G)::B(J)
        • R(b);SBLOCK,XR(G)::QAR2(H),XP(d)
      • Refutation
        • P(i);
    • Try
      • Q(H);XP(d)
      • Threat
        • R(D)+S(E),DCHECK
      • Vars
        • R(b);SBLOCK,XR(G)::QAR(H)+S(C)
        • R(b);SBLOCK::R1(G)
        • R(b);::R(D)+S(E),DCHECK,XR(b)
        • S(a);::R(D)+S(E),DCHECK,XS(a)
      • Refutation
        • P(g);P_SPINP(g),XS(C)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(f);S_FLIGHT::S(E)
      • K(f);P_SPINP(i),S_FLIGHT,XR(G)::S(E)
      • R(b);SBLOCK,XR(G)::R(D)+S(E),DCHECK
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