MESON Chess Problem Database

Problem Display
PID: 239810 (r7/1BP1p2q/1PR1P2p/3k1nQ1/3p1P2/B2rn2p/b1PP4/K3R3 w - - 0 1)

Cristoffanini, Guido

Nepszava, 1938

r7/1BP1p2q/1PR1P2p/3k1nQ1/3p1P2/B2rn2p/b1PP4/K3R3

#2

12 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rc4#
    • 1...Bc4
      • 2.Rd6#
    • 1...Sd1
      • 2.Re5#
      • 2.Rc3#
    • 1...Sf1
      • 2.Re5#
      • 2.Rc3#
    • 1...Sxc2+
      • 2.Rxc2#
    • 1...Sg2
      • 2.Re5#
      • 2.Rc3#
    • 1...Sc4
      • 2.Rd6#
    • 1...Sg4
      • 2.Rc3#
  • Tries
    • 1.Qg2+?
      • 1...Sxg2
        • 2.Re5#
        • 2.Rc3#
      • 1...hxg2!
    • 1.Qxf5+?
      • 1...Sxf5
        • 2.Re5#
        • 2.Rc3#
      • 1...Qxf5!
    • 1.Qh5?
      • threat
        • 2.Qf3#
      • 1...Sxc2+
        • 2.Rxc2#
      • 1...Sd1
        • 2.Re5#
        • 2.Rc3#
      • 1...Sf1
        • 2.Re5#
        • 2.Rc3#
      • 1...Sg2
        • 2.Re5#
        • 2.Rc3#
      • 1...Sc4
        • 2.Rd6#
      • 1...Sg4
        • 2.Rc3#
      • 1...Ke4!
    • 1.cxd3?
      • threat
        • 2.Rd6#
      • 1...Sc2+
        • 2.Rxc2#
      • 1...Rxa3!
    • 1.c4+?
      • 1...Ke4
        • 2.Rc5#
        • 2.Rd6#
      • 1...Bxc4
        • 2.Rd6#
      • 1...Sxc4
        • 2.Rd6#
      • 1...dxc4 ep!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qf3#
      • 1...Sxc2+
        • 2.Rxc2#
      • 1...Ke4
        • 2.Rc4#
      • 1...Sxg4
        • 2.Rc3#
      • 1...Sd1
        • 2.Re5#
        • 2.Rc3#
      • 1...Sf1
        • 2.Re5#
        • 2.Rc3#
      • 1...Sg2
        • 2.Re5#
        • 2.Rc3#
      • 1...Sc4
        • 2.Rd6#
      • 1...Sg3
        • 2.Rc3#
      • 1...Sh4
        • 2.Rc3#
      • 1...Sd6
        • 2.Rc5#
      • 1...Sg7
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(f);N_SPINS(g),P_SPINS(c),S_FLIGHT::B(K)+R(I)
    • B(a);P_PINB(E),SBLOCK::B(K)+R(I),DCHECK
    • S(c);CHECK,OGATE,XP(C)::B(K)+R(I),XS(c)
    • S(c);SBLOCK::B(K)+R(I),DCHECK
    • S(c);::B(K)+R(I)
  • Tries
    • Try
      • Q(G);CHECK,N_PINS(g)
      • Refutation
        • P(d);XQ(G)
    • Try
      • Q(G);CHECK,XS(g)
      • Refutation
        • Q(j);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • S(c);CHECK,OGATE,XP(C)::B(K)+R(I),XS(c)
        • S(c);SBLOCK::B(K)+R(I),DCHECK
        • S(c);::B(K)+R(I)
      • Refutation
        • K(f);N_SPINS(g),P_SPINS(c),S_FLIGHT
    • Try
      • P(C);XR(b)
      • Threat
        • B(K)+R(I),DCHECK
      • Vars
        • S(c);CHECK::B(K)+R(I),XS(c)
      • Refutation
        • R(k);XB(E)
    • Try
      • P(C);CHECK
      • Vars
        • B(a);P_PINB(E),SBLOCK,XP(C)::B(K)+R(I),DCHECK
        • S(c);SBLOCK,XP(C)::B(K)+R(I),DCHECK
      • Refutation
        • P(e);EP,XP(C)
  • Actual
    • Q(G);N_PINS(g)
    • Threat
      • QAB(G)
    • Vars
      • S(c);CHECK,OGATE,XP(C)::B(K)+R(I),XS(c)
      • K(f);P_SPINS(c),S_FLIGHT::B(K)+R(I)
      • S(c);XQ(G)::B(K)+R(I)
      • S(c);SBLOCK::B(K)+R(I),DCHECK
      • S(g);::B(K)+R(I)
      • S(g);SBLOCK::B(K)+R(I),DCHECK
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