MESON Chess Problem Database

Problem Display
PID: 83600 (3K1B2/8/6p1/PR1BP3/k3qRr1/3Q1n2/3r4/N1bb4 w - - 0 1)

Ellerman, Arnoldo

Western Morning News, 1925

(First published on Thu Dec 24 1925)

3K1B2/8/6p1/PR1BP3/k3qRr1/3Q1n2/3r4/N1bb4

#2

9 + 8

6490 yacpdb 2009
15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxc4#
    • 1...Rc2
      • 2.Bb3#
      • 2.Qb3#
    • 1...Be2
      • 2.Bb3#
      • 2.Qb3#
    • 1...Bb3
      • 2.Bxb3#
      • 2.Qxb3#
    • 1...Sd4
      • 2.Qc4#
  • Tries
    • 1.Rxe4+?
      • 1...Sd4
        • 2.Qc4#
      • 1...Rxe4!
    • 1.Rb4+?
      • 1...Kxa5
        • 2.Qb5#
      • 1...Qxb4!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Rd5#
      • 1...Sxe5
        • 2.Rxe5#
      • 1...Rb2
        • 2.Qa3#
      • 1...Rc2
        • 2.Qb3#
      • 1...Sd4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD::QAR2(B),XQ(f)
    • S(d);N_SPINQ(f),S_CUTQ(f)::QAR2(B)
  • Tries
    • Try
      • R(C);CHECK,XQ(f)
      • Vars
        • S(d);P_SPINS(d)::QAR2(B)
      • Refutation
        • R(g);XR(C)
    • Try
      • R(E);CHECK,N_PINQ(f)
      • Vars
        • K(e);P-FLIGHT,XP(D)::QAR1(B)
      • Refutation
        • Q(f);P_SPINQ(f),XR(E)
  • Actual
    • B(F);P_SPINQ(B)
    • Threat
      • B(F)+R(E)
    • Vars
      • S(d);OGATE,XP(G)::B(F)+R(E),XS(d)
      • R(c);N_PINQ(B)::QAR1(B)
      • R(c);N_PINQ(B)::QAB1(B)
      • S(d);N_PINQ(B),N_SPINQ(f)::QAR2(B)
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