MESON Chess Problem Database

Problem Display
PID: 206244 (3Q3B/p7/2P5/1pRqN3/3kN3/r2P4/b2P2K1/2R5 w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1928

3Q3B/p7/2P5/1pRqN3/3kN3/r2P4/b2P2K1/2R5

#2

10 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Bb1
      • 2.Rxd5#
      • 2.Qxd5#
  • Tries
    • 1.R1c3?
      • threat
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sg6#
        • 2.Sf7#
      • 1...Qxd8
        • 2.Sf3#
      • 1...Bc4
        • 2.Sf3#
        • 2.Sxc4#
        • 2.Sg4#
        • 2.Sg6#
        • 2.Sf7#
      • 1...Rxc3!
    • 1.R1c4+?
      • 1...bxc4
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Bxc4!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qf2#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qg8+
        • 2.Sg5#
      • 1...Qxc5
        • 2.Sc3#
      • 1...Qxe5
        • 2.Sf2#
      • 1...Rxd3
        • 2.Sf3#
      • 1...Qf7
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(5)
      • Vars
        • Q(e);N_PINS(E),N_SPINQ(e),XQ(I)::B(J)+S(G),DCHECK
      • Refutation
        • R(b);XR(A)
    • Try
      • R(A);CHECK
      • Refutation
        • B(a);XR(A)
  • Actual
    • Q(I);N_PINQ(e)
    • Threat
      • QAB(I)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(I),XQ(e)
      • Q(e);CHECK,N_PINS(E)::QAR(I)+S(E)
      • Q(e);N_PINS(E),SBLOCK,XR(F)::QAR(I)+S(E)
      • Q(e);N_PINS(E),P_SPINQ(e),XS(G)::QAR(I)+S(E)
      • R(b);SBLOCK,XP(D)::B(J)+S(G),DCHECK
      • Q(e);N_PINS(E)::QAR(I)+S(E)
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