MESON Chess Problem Database

Problem Display
PID: 97181 (8/b1Q5/P2P2p1/1p1p4/1p1k1P2/q3NK2/1RP1pP2/2R1N3 w - - 0 1)

Ceriani, Luigi

Il Problema, 1932

8/b1Q5/P2P2p1/1p1p4/1p1k1P2/q3NK2/1RP1pP2/2R1N3

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Rxb4#
    • 1...Qxe3+
      • 2.fxe3#
    • 1...Qxa6
      • 2.Rxb4#
    • 1...Bc5
      • 2.Qg7#
    • 1...b3
      • 2.c3#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qxa7#
      • 1...Qxa6
        • 2.Rd3#
        • 2.Rxb4#
      • 1...Qa5
        • 2.Rd3#
      • 1...Bc5
        • 2.Qg7#
      • 1...Bb6
        • 2.Qxb6#
      • 1...Bb8
        • 2.Qb6#
      • 1...Qxb3!
    • 1.c3+?
      • 1...bxc3
        • 2.S3c2#
      • 1...Qxc3!
  • Keys
    • 1.c4!
      • threat
        • 2.Qxa7#
      • 1...Qxe3+
        • 2.fxe3#
      • 1...Qxa6
        • 2.Rd2#
      • 1...bxc4 ep
        • 2.S3c2#
      • 1...Qa5
        • 2.Rd2#
      • 1...Bc5
        • 2.Qg7#
      • 1...Bb6
        • 2.Qxb6#
      • 1...Bb8
        • 2.Qb6#
      • 1...b3
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD,N_PINS(F)::R(C),XP(c)
    • Q(b);CHECK,OGATE,XS(F)::P(E),XQ(b)
    • Q(b);N_GUARD,N_PINS(F),XP(I)::R(C),XP(c)
    • B(h);SBLOCK::QAB(K)
    • P(c);N_GUARD,N_PINS(F),S_CUTQ(b)::P(D)
  • Tries
    • Try
      • R(C);N_SPINS(F)
      • Threat
        • QAB(K),XB(h)
      • Vars
        • Q(b);N_GUARD::R1(C)
        • B(h);SBLOCK::QAB(K)
        • B(h);N_GUARD::QAB(K),XB(h)
        • B(h);N_GUARD::QAB(K)
      • Refutation
        • Q(b);P_PINS(F),XR(C)
    • Try
      • P(D);CHECK,N_SPINS(F)
      • Vars
        • P(c);XP(D)::S(F)
      • Refutation
        • Q(b);P_PINS(F),XP(D)
  • Actual
    • P(D);
    • Threat
      • QAB(K),XB(h)
    • Vars
      • Q(b);CHECK,OGATE,XS(F)::P(E),XQ(b)
      • Q(b);N_GUARD,N_PINS(F),XP(I)::R(C)
      • P(c);EP,N_PINS(F),XP(D)::S(F)
      • Q(b);N_GUARD,N_PINS(F)::R(C)
      • B(h);SBLOCK::QAB(K)
      • B(h);N_GUARD::QAB(K),XB(h)
      • B(h);N_GUARD::QAB(K)
      • P(c);N_PINS(F),S_CUTQ(b)::R(C)
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