MESON Chess Problem Database

Problem Display
PID: 149006 (2b4R/R1bPN3/1n2k2N/1PQ3P1/2prrp2/K1p5/8/8 w - - 0 1)

Ellerman, Arnoldo

Good Companions (May), 1918

2b4R/R1bPN3/1n2k2N/1PQ3P1/2prrp2/K1p5/8/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.d8S#
  • Tries
    • 1.dxc8Q+?
      • 1...Rd7
        • 2.Qg8#
      • 1...Sd7
        • 2.Qg8#
      • 1...Sxc8!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Sf8#
      • 1...Kxd7
        • 2.Qc6#
      • 1...Sxd7
        • 2.Re8#
      • 1...Rd5
        • 2.Qe7#
      • 1...Rd6
        • 2.Qf5#
      • 1...Bd6
        • 2.d8S#
      • 1...Sd5
        • 2.dxc8Q#
        • 2.dxc8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(h);N_GUARD,P_PINQ(C),S_CUTR(c)::P=S
  • Tries
    • Try
      • P(G);CHECK,XB(i)
      • Vars
        • R(c);P_SPINR(c),SBLOCK::QAB(G)
        • S(f);P_SPINS(f),SBLOCK::QAB(G)
      • Refutation
        • S(f);XQ(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(g);P_SPINB(h),S_FLIGHT,XP(G)::QAB1(C)
      • S(f);SBLOCK,XP(G)::R(I)
      • R(c);SBLOCK::QAR1(C)
      • R(c);SBLOCK::QAB1(C)
      • B(h);N_GUARD,P_PINQ(C),S_CUTR(c)::P=S
      • S(f);N_GUARD,S_CUTR(c)::PXB(i)=Q
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