MESON Chess Problem Database

Problem Display
PID: 261874 (8/8/1PQ1p3/bp2B3/1pb2p2/p2P4/k3P3/1RK5 w - - 0 1)

Somma, Francesco

L'Echiquier, 1926

8/8/1PQ1p3/bp2B3/1pb2p2/p2P4/k3P3/1RK5

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.Ra1#
    • 1...Bd5
      • 2.Qc2#
    • 1...b3
      • 2.Ra1#
  • Tries
    • 1.Rb2+?
      • 1...Ka1
        • 2.Rc2#
        • 2.Rd2#
      • 1...axb2+!
    • 1.Qxc4+?
      • 1...b3
        • 2.Ra1#
        • 2.Qxb3#
      • 1...bxc4!
  • Keys
    • 1.Qg2!
      • threat
        • 2.e3#
        • 2.e4#
      • 1...Bxd3
        • 2.exd3#
      • 1...Bxb6
        • 2.e3#
      • 1...Bb3
        • 2.Ra1#
      • 1...Bd5
        • 2.e4#
      • 1...b3
        • 2.Ra1#
      • 1...f3
        • 2.exf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(d);SBLOCK::R1(A)
    • B(d);OGATE::QAR2(G)
    • P(c);SBLOCK::R1(A)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • P(b);CHECK,XR(A)
    • Try
      • Q(G);CHECK,XB(d)
      • Refutation
        • P(g);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • B(d);OGATE,XP(D)::QAR(G)+P(C),XB(d)
      • B(f);XP(F)::QAR(G)+P(C)
      • B(d);SBLOCK::R1(A)
      • B(d);::QAR(G)+P(C)
      • P(c);SBLOCK::R1(A)
      • P(e);OGATE::QAR(G)+P(C),XP(e)
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