MESON Chess Problem Database

Problem Display
PID: 28323 (1BNQR3/4Kb1B/2p3N1/8/R1P1k1Pr/1n3r2/2PPP2n/8 w - - 0 1)

Stocchi, Ottavio

5th Prize, La Settimana Enigmistica, 1934/I

1BNQR3/4Kb1B/2p3N1/8/R1P1k1Pr/1n3r2/2PPP2n/8

#2

13 + 7

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qd3#
    • 1...Rf2
      • 2.Qd3#
    • 1...Rc3
      • 2.Kxf7#
    • 1...Rd3
      • 2.Kxf7#
      • 2.Qxd3#
      • 2.cxd3#
    • 1...Re3
      • 2.Kxf7#
    • 1...Rg3
      • 2.Kxf7#
    • 1...Rfh3
      • 2.Kxf7#
    • 1...Rf4
      • 2.Qd3#
    • 1...Rf5
      • 2.Qd3#
    • 1...Rf6
      • 2.Qd3#
    • 1...Sd4
      • 2.Sd6#
  • Tries
    • 1.Sf4+?
      • 1...Bg6
        • 2.Kf6#
        • 2.Kf8#
        • 2.Bxg6#
      • 1...Rxh7!
    • 1.Sxh4+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.Qd3#
      • 1...Bg6!
    • 1.Qd4+?
      • 1...Sxd4
        • 2.Sd6#
      • 1...Kxd4!
    • 1.d3+?
      • 1...Rxd3
        • 2.Kxf7#
        • 2.Qxd3#
      • 1...Ke3!
    • 1.exf3+?
      • 1...Sxf3
        • 2.Qd3#
      • 1...Kxf3!
    • 1.c5+?
      • 1...Sd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Bc4!
  • Keys
    • 1.c3!
      • threat
        • 2.Sd6#
      • 1...Rxc3
        • 2.Kxf7#
      • 1...Bxc4
        • 2.Kd6#
      • 1...Bxg6
        • 2.Kd7#
      • 1...Sxd2
        • 2.Qd4#
      • 1...Rd3
        • 2.Kxf7#
        • 2.Qxd3#
      • 1...Rf6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD::QAB1(L)
    • R(c);::R(M)+K(H),XB(g)
    • S(b);SBLOCK::S(K)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • R(e);XB(I)
    • Try
      • S(G);CHECK,XR(e)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • Q(L);CHECK
      • Vars
        • S(b);SBLOCK,XQ(L)::S(K)
      • Refutation
        • K(d);P-FLIGHT,XQ(L)
    • Try
      • P(B);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • P(C);CHECK,XR(c)
      • Vars
        • S(a);XP(C)::QAB1(L)
      • Refutation
        • K(d);S_FLIGHT,XP(C)
    • Try
      • P(E);CHECK
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • P(A);
    • Threat
      • S(K)
    • Vars
      • R(c);XP(A)::R(M)+K(H),XB(g)
      • B(g);N_GUARD,P_SPINB(g),XP(E)::R(M)+K(H)
      • B(g);N_GUARD,P_SPINB(g),XS(G)::R(M)+K(H)
      • S(b);N_GUARD,XP(B)::QAR1(L)
      • R(c);N_GUARD::QAB1(L)
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