MESON Chess Problem Database

Problem Display
PID: 206195 (B7/8/4p1p1/1R4p1/R2n1kNp/4rN1K/1b4P1/5Q2 w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1925

B7/8/4p1p1/1R4p1/R2n1kNp/4rN1K/1b4P1/5Q2

#2

8 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sxe1#
    • 1...Rc3
      • 2.Rxd4#
    • 1...Rxf3+
      • 2.Qxf3#
    • 1...Re4
      • 2.Sxd4#
    • 1...Re5
      • 2.Se1#
      • 2.Sg1#
      • 2.Sd2#
      • 2.Sfh2#
      • 2.Sxd4#
      • 2.Sxh4#
      • 2.Sfxe5#
  • Tries
    • 1.Rxd4+?
      • 1...Re4
        • 2.Se1#
        • 2.Sg1#
        • 2.Sd2#
        • 2.Sfh2#
        • 2.Sxh4#
        • 2.Sfe5#
        • 2.Sxg5#
        • 2.Rxe4#
      • 1...Bxd4!
    • 1.Rb8?
      • threat
        • 2.Rf8#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Kf5
        • 2.Rf8#
      • 1...Re4
        • 2.Sxd4#
      • 1...Re5
        • 2.Se1#
        • 2.Sg1#
        • 2.Sd2#
        • 2.Sfh2#
        • 2.Sxd4#
        • 2.Sxh4#
        • 2.Sfxe5#
      • 1...Ba3!
  • Keys
    • 1.Rb7!
      • threat
        • 2.Rf7#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Ke4
        • 2.Rf7#
      • 1...Kf5
        • 2.Rf7#
      • 1...Re4
        • 2.Sxd4#
      • 1...Re5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(b);N_PINS(C)::QAR(A)+S(C),XR(b)
    • R(b);N_GUARD,S_CUTB(a)::R(E),XS(c)
    • R(b);CHECK,OGATE,P_SPINR(b),XS(C)::QAR1(A),XR(b)
    • R(b);N_PINS(C),N_SPINS(c)::QAR(A)+S(C),XS(c)
  • Tries
    • Try
      • R(E);CHECK,XS(c)
      • Refutation
        • B(a);XR(E)
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • R(b);CHECK,OGATE,P_SPINR(b),XS(C)::QAR1(A),XR(b)
        • K(d);N_SPINS(c),P-FLIGHT::R(G)
        • R(b);N_PINS(C),N_SPINS(c)::QAR(A)+S(C),XS(c)
      • Refutation
        • B(a);
  • Actual
    • R(G);
    • Threat
      • R(G)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XS(C)::QAR1(A),XR(b)
      • K(d);P-FLIGHT::B(H)+R(G)
      • K(d);N_SPINS(c),P-FLIGHT::R(G)
      • R(b);N_PINS(C),N_SPINS(c),SBLOCK::QAR(A)+S(C),XS(c)
      • R(b);N_PINS(C)::QAR(A)+S(C)
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