MESON Chess Problem Database

Problem Display
PID: 263351 (B1r5/2p3r1/5p1Q/Bp3R1p/1pk4q/b3P1Pp/Pn1R4/1N3K2 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1931

B1r5/2p3r1/5p1Q/Bp3R1p/1pk4q/b3P1Pp/Pn1R4/1N3K2

#2

10 + 12

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg3
      • 2.Rd4#
    • 1...Qg5
      • 2.Rd4#
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qf4+
      • 2.Qxf4#
    • 1...Sd3
      • 2.Rc2#
    • 1...b3
      • 2.Sxa3#
    • 1...c5
      • 2.Bd5#
  • Tries
    • 1.Bc6?
      • threat
        • 2.Bxb5#
      • 1...Qf4+
        • 2.Qxf4#
      • 1...Rb8!
    • 1.Rf4+?
      • 1...Kc5
        • 2.Rd5#
      • 1...Qxf4+!
  • Keys
    • 1.Qxh5!
      • threat
        • 2.Rc5#
      • 1...Qf4+
        • 2.Rxf4#
      • 1...Qxh5
        • 2.Rd4#
      • 1...Qg5
        • 2.Rd4#
      • 1...Qd4
        • 2.Rxd4#
      • 1...Rg5
        • 2.Qf7#
      • 1...Sd3
        • 2.Rc2#
      • 1...Sa4
        • 2.Qe2#
      • 1...b3
        • 2.Sxa3#
      • 1...c5
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD,XP(F)::R1(D)
    • Q(f);N_GUARD::R1(D)
    • Q(f);N_GUARD::R1(D),XQ(f)
    • Q(f);CHECK,N_GUARD::QAR(I),XQ(f)
    • S(a);SBLOCK::R(D)
    • P(d);N_GUARD::S(A),XB(b)
    • P(j);SBLOCK::B(J)
  • Tries
    • Try
      • B(J);
      • Threat
        • B(J),XP(g)
      • Vars
        • Q(f);CHECK,N_GUARD::QAR(I),XQ(f)
      • Refutation
        • R(l);
    • Try
      • R(H);CHECK
      • Vars
        • K(e);P-FLIGHT,S_CUTQ(f)::R1(D)
      • Refutation
        • Q(f);CHECK,XR(H)
  • Actual
    • Q(I);XP(h)
    • Threat
      • R1(H)
    • Vars
      • Q(f);CHECK,N_GUARD::R(H),XQ(f)
      • Q(f);N_GUARD,XQ(I)::R1(D)
      • Q(f);N_GUARD::R1(D)
      • Q(f);N_GUARD::R1(D),XQ(f)
      • R(k);N_GUARD::QAB(I)
      • S(a);SBLOCK::R(D)
      • S(a);N_GUARD::QAB(I)
      • P(d);N_GUARD::S(A),XB(b)
      • P(j);SBLOCK::B(J)
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