MESON Chess Problem Database

Problem Display
PID: 139404 (BQR5/8/5K2/2NN4/3k1p2/3r4/3q1pn1/1b1Rb3 w - - 0 1)

Ellerman, Arnoldo

Western Morning News and Mercury, 1918

(First published on Sat Sep 16 1922)

BQR5/8/5K2/2NN4/3k1p2/3r4/3q1pn1/1b1Rb3

#2

7 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sb3#
      • 2.Se6#
    • 1...Ra3
      • 2.Qb4#
    • 1...Re3
      • 2.Qb4#
    • 1...Rf3
      • 2.Qb4#
    • 1...Rg3
      • 2.Qb4#
    • 1...Rh3
      • 2.Qb4#
    • 1...Se3
      • 2.Qxf4#
  • Keys
    • 1.Se3!
      • threat
        • 2.Qe5#
      • 1...Kc3
        • 2.Se6#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Qxe3
        • 2.Sb3#
      • 1...Rxe3
        • 2.Qb4#
      • 1...Sxe3
        • 2.Se6#
      • 1...fxe3
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(f);P_SPINQ(c)::QAR2(F)
    • S(e);N_GUARD,S_CUTQ(c)::QAR2(F),XP(h)
  • Actual
    • S(C);
    • Threat
      • QAB1(F)
    • Vars
      • K(g);S_FLIGHT::R(G)+S(B)
      • K(g);S_FLIGHT,XS(C)::QAR2(F)
      • Q(c);P_SPINR(f),SBLOCK,XS(C)::S(B)
      • R(f);P_SPINQ(c),SBLOCK,XS(C)::QAR2(F)
      • S(e);SBLOCK,XS(C)::S(B)
      • P(h);SBLOCK,XS(C)::S(B)
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