MESON Chess Problem Database

Problem Display
PID: 53731 (2bQ4/3n1p2/2N2b2/1P3B2/P1k1Np2/1p1n1P2/1P6/1K1R4 w - - 0 1)

Ellerman, Arnoldo

Chess Life, 1955

2bQ4/3n1p2/2N2b2/1P3B2/P1k1Np2/1p1n1P2/1P6/1K1R4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sa5#
    • 1...S3c5
      • 2.Sd6#
    • 1...S3e5
      • 2.Rd4#
    • 1...S7c5
      • 2.Sd2#
    • 1...S7e5
      • 2.Qd4#
    • 1...Sb6
      • 2.Qxd3#
    • 1...Sb8
      • 2.Qxd3#
    • 1...Sf8
      • 2.Qxd3#
  • Tries
    • 1.Qxd7?
      • threat
        • 2.Qxd3#
      • 1...Sxb2
        • 2.Qd5#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sc1
        • 2.Qd5#
      • 1...Se1
        • 2.Qd5#
      • 1...Sf2
        • 2.Qd5#
      • 1...Sb4
        • 2.Sa5#
      • 1...Sc5
        • 2.Sd2#
        • 2.Sd6#
        • 2.Qd5#
      • 1...Se5
        • 2.Rc1#
        • 2.Rd4#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Bxd7!
  • Keys
    • 1.Bg6!
      • threat
        • 2.Bxf7#
      • 1...Kd5
        • 2.Bxf7#
      • 1...fxg6
        • 2.Qg8#
      • 1...Sb4
        • 2.Sa5#
      • 1...S3c5
        • 2.Sd6#
      • 1...S3e5
        • 2.Rd4#
      • 1...S7c5
        • 2.Sd2#
      • 1...S7e5
        • 2.Qd4#
      • 1...Sb6
        • 2.Qxd3#
      • 1...Sb8
        • 2.Qxd3#
      • 1...Sf8
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::S(I)
    • S(b);SBLOCK::S(F)
    • S(b);OGATE::R1(B)
    • S(f);SBLOCK::S(F)
    • S(f);OGATE::QAR1(J)
    • S(f);OGATE::QAB1(J),XS(b)
  • Tries
    • Try
      • Q(J);XS(f)
      • Threat
        • QAB1(J),XS(b)
      • Vars
        • S(b);XP(C)::QAB1(J)
        • B(e);N_GUARD::QAR1(J),XB(e)
        • S(b);::QAB1(J)
        • S(b);SBLOCK::S(I)
      • Refutation
        • B(h);XQ(J)
  • Actual
    • B(H);
    • Threat
      • B(H),XP(g)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::B(H),XP(g)
      • P(g);OGATEB,XB(H)::QAB(J)
      • S(b);SBLOCK::S(I)
      • S(b);SBLOCK::S(F)
      • S(b);OGATE::R1(B)
      • S(f);SBLOCK::S(F)
      • S(f);OGATE::QAR1(J)
      • S(f);OGATE::QAB1(J),XS(b)
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