MESON Chess Problem Database

Problem Display
PID: 24755 (4R1K1/4bpN1/3p3B/1R4n1/2p1k1N1/7b/2p1P1r1/Q6B w - - 0 1)

Stocchi, Ottavio

1st Prize, La Giostra Enigmistica, 1934

4R1K1/4bpN1/3p3B/1R4n1/2p1k1N1/7b/2p1P1r1/Q6B

#2

9 + 9

56 The Problemist 1938
3098 FIDE Album (1914-1944) (I) 1971
3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Sf6#
    • 1...Se6
      • 2.Sf2#
    • 1...Sh7
      • 2.Sf2#
      • 2.Rxe7#
    • 1...c3
      • 2.Qa4#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Bxg5?
      • threat
        • 2.Sf2#
        • 2.Sf6#
        • 2.Rxe7#
      • 1...c3
        • 2.Qa4#
      • 1...f6
        • 2.Sf2#
        • 2.Sxf6#
        • 2.Rxe7#
      • 1...Bxg4!
    • 1.Re5+?
      • 1...dxe5
        • 2.Qxe5#
      • 1...Kf4!
    • 1.Rxe7+?
      • 1...Se6
        • 2.Sf2#
        • 2.Sf6#
      • 1...Kf4!
    • 1.Qc1?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Bxg4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...d5
        • 2.Qe5#
      • 1...Sf3
        • 2.Sxd6#
      • 1...Se6
        • 2.Sg3#
      • 1...c3
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(f);N_SPINR(b)::S(D)
    • S(f);N_SPINB(h)::S(D)
    • P(d);OGATEB::QAR(A)
    • P(g);N_GUARD::QAR1(A)
  • Tries
    • Try
      • B(F);XS(f)
      • Threat
        • DUALS(3)
      • Vars
        • P(d);OGATEB::QAR(A)
      • Refutation
        • B(c);XS(D)
    • Try
      • R(E);CHECK,N_PINB(h)
      • Vars
        • P(g);OGATE,XR(E)::QAR1(A),XP(g)
      • Refutation
        • K(e);N_SPINR(b),P-FLIGHT,P_SPINS(f)
    • Try
      • R(H);CHECK,XB(h)
      • Refutation
        • K(e);N_SPINR(b),P-FLIGHT,P_SPINS(f)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(e);N_SPINB(h),N_SPINR(b),P-FLIGHT::QAB1(A)
      • Refutation
        • B(c);XS(D)
  • Actual
    • S(G);
    • Threat
      • QAR1(A)
    • Vars
      • K(e);N_SPINB(h),N_SPINR(b),P-FLIGHT,P_SPINS(f)::QAR2(A)
      • P(g);N_GUARD::QAR1(A)
      • S(f);N_SPINR(b),P_PINS(D)::S(G),XP(g)
      • S(f);N_SPINB(h),P_PINS(D)::S(G)
      • P(d);OGATEB::QAR(A)
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