MESON Chess Problem Database

Problem Display
PID: 228892 (4rrn1/p5pB/8/KQ1b1q2/2p1k1PR/2R2Np1/1p2P3/2b5 w - - 0 1)

Cristoffanini, Guido

Revista de Sah, 1926

4rrn1/p5pB/8/KQ1b1q2/2p1k1PR/2R2Np1/1p2P3/2b5

#2

8 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.gxf5#
    • 1...Bh6
      • 2.g5#
    • 1...Be6
      • 2.Qe5#
    • 1...Bf7
      • 2.Qxf5#
  • Tries
    • 1.Qxd5+?
      • 1...Kf4
        • 2.gxf5#
      • 1...Kxd5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.gxf5#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bc6
        • 2.Rxc4#
      • 1...Be6
        • 2.Qe5#
      • 1...Bb7
        • 2.Rxc4#
      • 1...Bf7
        • 2.Qxf5#
      • 1...Ba8
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINQ(g),P-FLIGHT::R(E)+P(D),XQ(g)
    • B(a);N_GUARD::R(E)+P(D)
    • B(f);OGATE,P_PINQ(G)::QAR1(G)
    • B(f);OGATE,P_PINQ(G)::QAB1(G),XQ(g)
  • Tries
    • Try
      • Q(G);CHECK,P_SPINQ(G),XB(f)
      • Vars
        • K(e);N_SPINQ(g),P-FLIGHT::R(E)+P(D),XQ(g)
      • Refutation
        • K(e);N_SPINQ(g),S_FLIGHT,XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • K(e);N_SPINQ(g),P-FLIGHT::R(E)+P(D),XQ(g)
      • B(a);N_GUARD::QAR1(G),XB(a)
      • B(f);N_GUARD,P_PINQ(G)::R(B),XP(d)
      • B(f);OGATE,P_PINQ(G)::QAR1(G)
      • B(f);OGATE,P_PINQ(G)::QAB1(G),XQ(g)
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