MESON Chess Problem Database

Problem Display
PID: 143396 (B2Bn1K1/3ppPn1/3k1p1N/2p2P2/8/1b6/1Q6/8 w - - 0 1)

Ellerman, Arnoldo

Good Companions (July), 1917

B2Bn1K1/3ppPn1/3k1p1N/2p2P2/8/1b6/1Q6/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Qh2#
    • 1...Bxf7+
      • 2.Sxf7#
    • 1...Se6
      • 2.fxe8S#
    • 1...c4
      • 2.Qd4#
    • 1...e6
      • 2.f8Q#
      • 2.f8B#
  • Tries
    • 1.Qd4+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...cxd4!
    • 1.Qd2+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Ke5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe7#
      • 1...Bxf7+
        • 2.Sxf7#
      • 1...Sxf5
        • 2.Sxf5#
      • 1...Be6
        • 2.Qh2#
      • 1...Se6
        • 2.fxe8S#
      • 1...e5
        • 2.Qa6#
      • 1...e6
        • 2.f8Q#
        • 2.f8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);S_CUTP(f)::QAB(A)
    • B(a);CHECK,XP(D)::S(C),XB(a)
    • S(g);N_PINP(D)::PXS(h)=S
    • P(b);N_GUARD,N_PINP(D),S_CUTB(a)::QAR2(A)
    • P(f);N_PINP(D)::P=Q
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(f)
    • Vars
      • B(a);CHECK,XP(D)::S(C),XB(a)
      • S(g);XP(B)::S(C),XS(g)
      • B(a);S_CUTP(f)::QAB(A)
      • S(g);N_PINP(D)::PXS(h)=S
      • P(f);SBLOCK::QAR(A)
      • P(f);N_PINP(D)::P=Q
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Developed and maintained by Brian Stephenson.
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