MESON Chess Problem Database

Problem Display
PID: 241600 (3Rq1NK/1n1B3p/N7/1rBkP2R/1np5/4pP2/6Q1/1b6 w - - 0 1)

Cristoffanini, Guido

Magyar Sakkvilag, 1927

3Rq1NK/1n1B3p/N7/1rBkP2R/1np5/4pP2/6Q1/1b6

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Se7#
    • 1...Qxe5+
      • 2.Sf6#
    • 1...Qe7
      • 2.Sxe7#
    • 1...Qxg8+
      • 2.Qxg8#
    • 1...Ba2
      • 2.f4#
    • 1...Be4
      • 2.fxe4#
    • 1...Sc2
      • 2.f4#
    • 1...Sd3
      • 2.f4#
  • Tries
    • 1.Bxe8+?
      • 1...Ke6
        • 2.Sc7#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sxd8!
    • 1.e6+?
      • 1...Bf5
        • 2.Rxf5#
        • 2.f4#
      • 1...Qxh5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qd4#
      • 1...Qxe5+
        • 2.Sf6#
      • 1...Qxg8+
        • 2.Qxg8#
      • 1...Qxd7
        • 2.Se7#
      • 1...Rxc5
        • 2.Sxb4#
      • 1...Sxc5
        • 2.Sc7#
      • 1...Be4
        • 2.Qxe4#
        • 2.fxe4#
      • 1...Sc2
        • 2.Qe4#
      • 1...Sc6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(i);N_PINS(I)::S(I)
    • Q(i);CHECK,N_PINS(I),P_SPINQ(i),XP(D)::S(I)
    • Q(i);N_PINS(I)::S(I),XQ(i)
    • Q(i);CHECK,OGATE,XS(I)::QAB(A),XQ(i)
    • B(a);N_GUARD::QAB(A)+P(B)
    • B(a);OGATE::P(B),XB(a)
    • S(c);S_CUTB(a)::QAB(A)+P(B)
  • Tries
    • Try
      • B(G);CHECK,N_SPINS(I),XQ(i)
      • Vars
        • K(f);S_FLIGHT::S(F)
        • S(g);N_GUARD,P_SPINS(g)::R1(H),XS(g)
      • Refutation
        • S(g);XR(H)
    • Try
      • P(D);CHECK
      • Refutation
        • Q(i);N_PINS(I),XR(E)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • Q(i);CHECK,N_PINS(I),P_SPINQ(i),XP(D)::S(I)
      • Q(i);CHECK,OGATE,XS(I)::QAB(A),XQ(i)
      • Q(i);N_PINS(I),P_SPINQ(i),XB(G)::S(I)
      • R(e);N_GUARD,SBLOCK,XB(C)::S(F),XS(c)
      • S(g);SBLOCK,XB(C)::S(F)
      • S(c);S_CUTB(a)::QAB1(A)
      • S(c);SBLOCK::R(H)+B(G),DCHECK
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Developed and maintained by Brian Stephenson.
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