MESON Chess Problem Database

Problem Display
PID: 139480 (7n/2rbN1Q1/7p/Rq5k/8/6P1/4R1P1/3B1K2 w - - 0 1)

Ellerman, Arnoldo

Western Morning News and Mercury, 1927

7n/2rbN1Q1/7p/Rq5k/8/6P1/4R1P1/3B1K2

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Re5#
      • 2.Re6#
    • 1...Qc5
      • 2.Re5#
      • 2.Re6#
    • 1...Qd5
      • 2.Re5#
      • 2.Re6#
    • 1...Qe5
      • 2.Rexe5#
    • 1...Qf5+
      • 2.Rf2#
    • 1...Qg5
      • 2.Re6#
    • 1...Rc4
      • 2.Re5#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sf7
      • 2.Qg6#
  • Tries
    • 1.Rxb5+?
      • 1...Rc5
        • 2.Re5#
        • 2.Re6#
      • 1...Bf5
        • 2.Re1#
        • 2.Ra2#
        • 2.Reb2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Rf2#
        • 2.Re3#
        • 2.Re4#
        • 2.Ree5#
        • 2.Re6#
        • 2.Rxf5#
      • 1...Bxb5!
    • 1.Qxh6+?
      • 1...Kg4
        • 2.Qh4#
      • 1...Kxh6!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qh4#
      • 1...Qf5+
        • 2.Rf2#
      • 1...Kg4
        • 2.Qh4#
      • 1...Qg5
        • 2.Re6#
      • 1...Rc4
        • 2.Re5#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_PINR(C)::B(A)+R(C),DCHECK,XQ(a)
    • Q(a);CHECK,N_PINR(C)::B(A)+R(C)
    • Q(a);N_PINR(C)::B(A)+R(C)
    • R(d);N_PINR(C)::B(A)+R(C),DCHECK
    • S(f);N_GUARD::QAB1(H),XS(f)
    • S(f);N_GUARD::QAB1(H)
  • Tries
    • Try
      • R(F);CHECK,N_SPINR(C),XQ(a)
      • Refutation
        • B(e);P_PINR(C),XR(F)
    • Try
      • Q(H);CHECK,XP(c)
      • Vars
        • K(b);N_SPINQ(a),OGATE,S_FLIGHT::QAR1(H)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT,XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • Q(a);CHECK,N_PINR(C)::B(A)+R(C)
      • K(b);N_SPINQ(a),S_FLIGHT::QAR1(H)
      • Q(a);N_PINR(C)::B(A)+R(C)
      • R(d);N_PINR(C)::B(A)+R(C),DCHECK
      • S(f);N_GUARD::QAB1(H),XS(f)
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