MESON Chess Problem Database

Problem Display
PID: 268716 (N1Q3b1/pP2R3/r2p4/1P1k4/1p4R1/n5bK/4p1NB/3r1q1B w - - 0 1)

Cristoffanini, Guido

1st Prize, Gazeta Polska, 1934

N1Q3b1/pP2R3/r2p4/1P1k4/1p4R1/n5bK/4p1NB/3r1q1B

#2

10 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2+
      • 2.Bxg2#
    • 1...Qe1
      • 2.Sxe1#
      • 2.Se3#
    • 1...Qg1
      • 2.Se3#
    • 1...Qxh1
      • 2.Se3#
    • 1...Qf2
      • 2.Se3#
    • 1...Qf3
      • 2.Se3#
    • 1...Qf5
      • 2.Se3#
    • 1...Qf6
      • 2.Se3#
    • 1...Qf7
      • 2.Se3#
    • 1...Qf8
      • 2.Se3#
    • 1...Ra4
      • 2.Qc6#
    • 1...Ra5
      • 2.Qc6#
    • 1...Rc6
      • 2.Qxc6#
    • 1...Bf2
      • 2.Qf5#
    • 1...Sb1
      • 2.Qc4#
    • 1...Sc2
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sxb5
      • 2.Qc4#
  • Tries
    • 1.Sb6+?
      • 1...axb6
        • 2.Qc6#
      • 1...Rxb6!
    • 1.Qc3?
      • threat
        • 2.Sc7#
      • 1...Qxg2+
        • 2.Bxg2#
      • 1...Sxb5
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Rc6
        • 2.Qxc6#
      • 1...bxc3!
  • Keys
    • 1.Bg1!
      • threat
        • 2.Sc7#
      • 1...Qxg2+
        • 2.Bxg2#
      • 1...Qxg1
        • 2.Se3#
      • 1...Sxb5
        • 2.Qc4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Qf2
        • 2.Se3#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Rc1
        • 2.Rd4#
      • 1...Rd4
        • 2.Rxd4#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Bf2
        • 2.Qf5#
      • 1...Bf4
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(B)::B(A),XQ(b)
    • Q(b);N_PINS(B)::B(A)+S(B),DCHECK
    • Q(b);N_PINS(B),P_PINB(C),XB(A)::S(B)
    • Q(b);N_PINS(B)::S(B)
    • Q(b);N_PINS(B),P_PINR(E)::B(A)+S(B),DCHECK
    • R(h);N_GUARD::QAB1(J)
    • R(h);N_GUARD::QAB1(J),XR(h)
    • B(e);N_GUARD,S_CUTQ(b)::QAR2(J)
    • S(d);N_GUARD::QAB1(J)
    • S(d);N_GUARD::QAB1(J),XS(d)
    • S(d);N_GUARD,XP(F)::QAB1(J)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • P(j);XS(I)::QAB1(J)
      • Refutation
        • R(h);XS(I)
    • Try
      • Q(J);
      • Threat
        • S(I)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XS(B)::B(A),XQ(b)
        • S(d);N_GUARD,XP(F)::QAB1(J)
        • S(d);N_GUARD::QAB1(J),XS(d)
        • R(h);N_GUARD::QAB1(J),XR(h)
      • Refutation
        • P(f);XQ(J)
  • Actual
    • B(C);
    • Threat
      • S(I)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(B)::B(A),XQ(b)
      • Q(b);N_PINS(B),XB(C)::B(A)+S(B),DCHECK
      • S(d);N_GUARD,XP(F)::QAB1(J)
      • B(k);N_GUARD,P_PINR(E)::QAB1(J),XB(k)
      • Q(b);N_PINS(B)::B(A)+S(B),DCHECK
      • Q(b);N_PINS(B)::B(A)+S(B),DCHECK,XQ(b)
      • R(a);N_GUARD::R1(E)
      • R(a);N_GUARD::R1(E),XR(a)
      • R(h);N_GUARD::QAB1(J),XR(h)
      • B(e);N_GUARD,S_CUTQ(b)::QAR2(J)
      • B(e);S_CUTQ(b)::QAB(J),XB(k)
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