MESON Chess Problem Database

Problem Display
PID: 196927 (1B4B1/8/r1p3RK/3P4/n2k1N2/3pp3/N2bp1P1/1Q6 w - - 0 1)

Ellerman, Arnoldo

British Chess Magazine, 1919

1B4B1/8/r1p3RK/3P4/n2k1N2/3pp3/N2bp1P1/1Q6

#2

9 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxd3#
    • 1...Bc1
      • 2.Qb4#
    • 1...Bb4
      • 2.Qxb4#
    • 1...Sc3
      • 2.Qb4#
    • 1...c5
      • 2.Qxd3#
  • Keys
    • 1.Rg4!
      • threat
        • 2.Sxd3#
      • 1...cxd5+
        • 2.Se6#
      • 1...c5+
        • 2.Sg6#
      • 1...Kc4
        • 2.Sxd3#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Kc5
        • 2.Sxd3#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sc5
        • 2.Sxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(f);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
    • B(a);N_GUARD::QAR2(A)
    • B(a);N_GUARD::QAR2(A),XB(a)
    • S(e);S_CUTB(a)::QAR2(A)
    • P(h);P_PINR(F),SBLOCK::QAR1(A),XP(c)
  • Actual
    • R(F);
    • Threat
      • R(F)+S(D),XP(c)
    • Vars
      • P(h);CHECK,SBLOCK,XP(E)::R(F)+S(D),DCHECK
      • P(h);CHECK,SBLOCK::R(F)+S(D)
      • K(f);P-FLIGHT::R(F)+S(D),XP(c)
      • K(f);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
      • K(f);S_FLIGHT::S(D),XP(c)
      • S(e);S_CUTB(a)::QAR2(A)
      • S(e);SBLOCK::R(F)+S(D),DCHECK,XP(b)
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