MESON Chess Problem Database

Problem Display
PID: 114182 (b7/Q4pq1/1pNpk1P1/1N1r3P/2P2PPb/3P2P1/1B2B1K1/4R3 w - - 0 1)

Stocchi, Ottavio

1st HM., Szachy, 1949

b7/Q4pq1/1pNpk1P1/1N1r3P/2P2PPb/3P2P1/1B2B1K1/4R3

#2

14 + 8

14475 Mat Plus Review 2007
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2
      • 2.Qxf7#
    • 1...Qc3
      • 2.Qxf7#
    • 1...Qd4
      • 2.Qxf7#
    • 1...Qe5
      • 2.Qxf7#
    • 1...Qh6
      • 2.Qxf7#
    • 1...Qh8
      • 2.Qxf7#
    • 1...Rxd3
      • 2.f5#
    • 1...Rg5
      • 2.Qe7#
    • 1...Bxg3
      • 2.Sd8#
      • 2.Qe7#
    • 1...Be7
      • 2.Qxe7#
    • 1...Bd8
      • 2.Sxd8#
    • 1...f6
      • 2.Sd8#
  • Tries
    • 1.Sbd4+?
      • 1...Kf6
        • 2.Qe7#
      • 1...Qxd4
        • 2.Qxf7#
      • 1...Rxd4!
    • 1.Bd1+?
      • 1...Qe5
        • 2.Qxf7#
      • 1...Re5!
    • 1.Bf1+?
      • 1...Qe5
        • 2.Qxf7#
      • 1...Re5!
    • 1.Bf3+?
      • 1...Qe5
        • 2.Qxf7#
      • 1...Re5!
  • Keys
    • 1.g5!
      • threat
        • 2.Bg4#
      • 1...Kf5
        • 2.Qd7#
      • 1...Qxb2
        • 2.Qxf7#
      • 1...Re5
        • 2.Sd4#
      • 1...Qe5
        • 2.Qxf7#
      • 1...Rf5
        • 2.Qe7#
      • 1...f5
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(g);N_GUARD,P_PINB(C),XB(B)::QAB1(N),XP(f)
    • Q(g);N_GUARD::QAB1(N),XP(f)
    • R(b);N_GUARD,P_PINS(L),XP(E)::P(H)
    • R(b);P_PINS(L),S_CUTB(a)::QAR1(N)
    • B(a);N_GUARD::QAR1(N),XB(a)
    • B(a);N_GUARD::S(L),XB(a)
    • P(f);S_CUTB(a)::S(L)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(N)
        • Q(g);XS(J)::QAB1(N),XP(f)
      • Refutation
        • R(b);P_PINS(L),XS(J)
    • Try
      • B(C);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::QAB1(N),XP(f)
      • Refutation
        • R(b);P_PINS(L),P_SPINR(b)
    • Try
      • B(C);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::QAB1(N),XP(f)
      • Refutation
        • R(b);P_PINS(L),P_SPINR(b)
    • Try
      • B(C);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::QAB1(N),XP(f)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • P(I);
    • Threat
      • R(A)+B(C),DCHECK
    • Vars
      • K(e);S_FLIGHT::QAB(N)
      • Q(g);N_GUARD,P_PINB(C),XB(B)::QAB1(N),XP(f)
      • R(b);N_GUARD,P_PINS(L),S_CUTQ(g)::S(J)
      • Q(g);N_GUARD::QAB1(N),XP(f)
      • R(b);P_PINS(L),SBLOCK::QAR1(N)
      • P(f);SBLOCK::S(L)
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