MESON Chess Problem Database

Problem Display
PID: 65335 (1b5B/r2P1P1K/r1p1NNp1/1pP1kp1R/7n/p2pp3/Q7/2R5 w - - 0 1)

Shanshin, Valery Yurevich

4th Place, Candidates Ty., 1992

1b5B/r2P1P1K/r1p1NNp1/1pP1kp1R/7n/p2pp3/Q7/2R5

#2

10 + 12

3681 FIDE Album (1992-1994) 2001

SOLUTION

  • SOUND
  • Tries
    • 1.Sd5+?
      • 1...Ke4
        • 2.Sg5#
      • 1...Kxe6!
    • 1.Qc4?
      • threat
        • 2.Se4#
        • 2.Sg4#
        • 2.Se8#
        • 2.Sg8#
        • 2.Qe4#
      • 1...gxh5
        • 2.Se4#
        • 2.Sg4#
        • 2.Sxh5#
        • 2.Se8#
        • 2.Sg8#
      • 1...Ra4
        • 2.Se4#
        • 2.Sg4#
        • 2.Se8#
        • 2.Sg8#
      • 1...g5
        • 2.Se4#
        • 2.Sg4#
        • 2.Se8#
        • 2.Sg8#
      • 1...bxc4!
    • 1.d8S?
      • threat
        • 2.Qa1#
        • 2.Qh2#
      • 1...Rxf7+
        • 2.Sxf7#
      • 1...gxh5
        • 2.Qa1#
      • 1...Ra4
        • 2.Sxc6#
      • 1...Rd7
        • 2.Qh2#
      • 1...Sg2
        • 2.Qa1#
      • 1...d2
        • 2.Qa1#
      • 1...e2
        • 2.Qa1#
      • 1...g5
        • 2.Qa1#
      • 1...Sf3!
    • 1.f8S?
      • threat
        • 2.Qa1#
        • 2.Qh2#
      • 1...Rxd7+
        • 2.S8xd7#
      • 1...gxh5
        • 2.Qa1#
      • 1...Sg2
        • 2.Sxg6#
        • 2.Qa1#
      • 1...Sf3
        • 2.Sxg6#
      • 1...d2
        • 2.Qa1#
      • 1...e2
        • 2.Qa1#
      • 1...g5
        • 2.Qa1#
      • 1...Ra4!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sd5#
      • 1...Kd4
        • 2.Qa1#
      • 1...Kf4
        • 2.Qh2#
      • 1...f4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);N_SPINP(g),P-FLIGHT::S(E)
      • Refutation
        • K(f);N_SPINP(g),P-FLIGHT,XS(E)
    • Try
      • Q(B);
      • Threat
        • DUALS(5)
      • Refutation
        • P(e);XQ(B)
    • Try
      • P(G);P_SPINP(H)
      • Threat
        • DUALS(2)
      • Vars
        • R(k);CHECK,XP(H)::S(G),XR(k)
        • P(j);N_SPINP(g),XR(D)::QAB(B)
        • R(h);N_GUARD::S(G),XP(i)
        • R(k);::QAB(B)
        • S(d);::QAB(B)
        • P(b);::QAB(B)
        • P(c);::QAB(B)
        • P(j);N_SPINP(g)::QAB(B)
      • Refutation
        • S(d);
    • Try
      • P(H);P_SPINP(G)
      • Threat
        • DUALS(2)
      • Vars
        • R(k);CHECK,XP(G)::S(H),XR(k)
        • P(j);N_SPINP(g),XR(D)::QAB(B)
        • S(d);N_GUARD::S(H),XP(j)
        • P(b);::QAB(B)
        • P(c);::QAB(B)
        • P(j);N_SPINP(g)::QAB(B)
      • Refutation
        • R(h);
  • Actual
    • S(E);N_PINP(g)
    • Threat
      • B(J)+S(F)
    • Vars
      • K(f);S_FLIGHT::QAB(B)
      • P(g);SBLOCK::R(D)+S(E),DCHECK
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