MESON Chess Problem Database

Problem Display
PID: 83655 (B1r4q/b2pR3/2p1P3/1N1k1p2/N2nnP2/1P6/6Q1/K2R4 w - - 0 1)

Ellerman, Arnoldo

UJCS, 1951

B1r4q/b2pR3/2p1P3/1N1k1p2/N2nnP2/1P6/6Q1/K2R4

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Sac3#
    • 1...dxe6
      • 2.Rd7#
    • 1...d6
      • 2.Sbc3#
  • Tries
    • 1.Sc7+?
      • 1...Kd6
        • 2.Rxd7#
      • 1...Rxc7!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qc4#
      • 1...Sd2
        • 2.Rxd7#
      • 1...Sf2
        • 2.Rxd7#
      • 1...Sc3
        • 2.Rxd7#
      • 1...Sg3
        • 2.Rxd7#
      • 1...Sc5
        • 2.Sac3#
      • 1...Sg5
        • 2.Rxd7#
      • 1...Sd6
        • 2.Sbc3#
      • 1...Sf6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • B(f);SBLOCK::S(E)
    • P(g);SBLOCK,XP(H)::R(I)
    • P(g);SBLOCK::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::R1(I),XP(g)
      • Refutation
        • R(h);XS(G)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • S(b);N_GUARD,N_SPINS(a)::R(I),XP(g)
      • S(b);N_GUARD::R(I),XP(g)
      • S(b);N_GUARD,SBLOCK::S(E)
      • S(b);N_GUARD,SBLOCK::S(G)
      • S(b);OGATE::QAR1(C)
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