MESON Chess Problem Database

Problem Display
PID: 88105 (K2n2Nq/1R1bP1r1/2p1p1n1/1RPkP1r1/p2Np1Pb/8/1BQpP3/8 w - - 0 1)

Stocchi, Ottavio

Israel Problemists' Association, 1955

K2n2Nq/1R1bP1r1/2p1p1n1/1RPkP1r1/p2Np1Pb/8/1BQpP3/8

#2

12 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Rxd7#
    • 1...Sxe5
      • 2.Sf6#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Sc7#
      • 1...Kxe6
        • 2.Qc4#
      • 1...Bxe6
        • 2.Sf6#
      • 1...Sxe6
        • 2.Rxd7#
      • 1...cxb5!
    • 1.Qb3+?
      • 1...Kxe5
        • 2.Sxe6#
      • 1...axb3!
    • 1.Qxe4+?
      • 1...Kc4
        • 2.Sc2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Sf5#
        • 2.Sxc6#
        • 2.Sxe6#
      • 1...Kxe4!
    • 1.Qc4+?
      • 1...Kxe5
        • 2.Sxe6#
      • 1...Kxc4!
  • Keys
    • 1.Sxc6!
      • threat
        • 2.Sb4#
      • 1...Kxc6
        • 2.Qxe4#
      • 1...Bxc6
        • 2.Sf6#
      • 1...Sxc6
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);SBLOCK,XP(H)::R(I),XB(j)
    • S(i);SBLOCK,XP(H)::S(L)
  • Tries
    • Try
      • S(D);XP(h)
      • Threat
        • S(D)
      • Vars
        • K(e);S_FLIGHT,XS(D)::QAB(B)
        • B(j);SBLOCK,XS(D)::S(L)
        • S(l);P_PINS(L),SBLOCK,XS(D)::R(I),XB(j)
      • Refutation
        • P(g);XR(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(H)::B(A)+S(D),XP(h)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);CHECK,XP(c)
      • Refutation
        • K(e);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(H)::B(A)+S(D),XP(h)
      • Refutation
        • K(e);S_FLIGHT,XQ(B)
  • Actual
    • S(D);XP(g)
    • Threat
      • S(D)
    • Vars
      • K(e);S_FLIGHT,XS(D)::QAB(B),XP(c)
      • B(j);P_PINR(I),SBLOCK,XS(D)::S(L)
      • S(l);P_PINS(L),SBLOCK,XS(D)::R(I),XB(j)
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