MESON Chess Problem Database

Problem Display
PID: 137999 (1r6/p7/B3rp2/Q2P4/3bp1R1/2N1k3/2P3P1/Kb2B3 w - - 0 1)

Ellerman, Arnoldo

Western Morning News and Mercury, 1926

(First published on Sat Aug 14 1926)

1r6/p7/B3rp2/Q2P4/3bp1R1/2N1k3/2P3P1/Kb2B3

#2

9 + 8

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa6
      • 2.Rxe4#
    • 1...Reb6
      • 2.Rxe4#
    • 1...Rc6
      • 2.Rxe4#
    • 1...Rd6
      • 2.Rxe4#
    • 1...Rb2
      • 2.Sd1#
    • 1...Bxc3+
      • 2.Qxc3#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Be5
      • 2.Rxe4#
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qc1#
      • 1...Bxc3+
        • 2.Qxc3#
      • 1...Rxa6
        • 2.Rxe4#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Be5
        • 2.Rxe4#
      • 1...Bb6
        • 2.Se2#
      • 1...Rb2
        • 2.Sd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD,P_PINQ(G),XB(I)::R1(F),XP(d)
    • R(e);N_GUARD::R1(F),XP(d)
    • R(h);N_PINS(E)::S(E)
    • B(c);CHECK,OGATE,XS(E)::QAR2(G),XB(c)
    • B(c);N_PINS(E),OGATEB::QAB(G),XB(c)
    • B(c);S_CUTR(e)::R1(F),XP(d)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(E)::QAR2(G),XB(c)
      • R(e);N_GUARD,P_PINQ(G),XB(I)::R1(F),XP(d)
      • B(c);N_PINS(E),OGATEB::QAB(G),XB(c)
      • B(c);S_CUTR(e)::R1(F),XP(d)
      • B(c);N_PINS(E)::QAR(G)+S(E)
      • R(h);N_PINS(E)::QAR(G)+S(E),DCHECK
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