MESON Chess Problem Database

Problem Display
PID: 83542 (4R1Bn/3p4/3PPp2/1Q5K/R1bbkp2/6p1/2N1n3/4N3 w - - 0 1)

Ellerman, Arnoldo

Good Companions (December), 1920

4R1Bn/3p4/3PPp2/1Q5K/R1bbkp2/6p1/2N1n3/4N3

#2

9 + 9

3391 Het Half Pin Thema 1924
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.exd7#
    • 1...Bg1
      • 2.exd7#
    • 1...Bf2
      • 2.exd7#
    • 1...Be3
      • 2.exd7#
    • 1...Bb6
      • 2.exd7#
    • 1...Ba7
      • 2.exd7#
  • Tries
    • 1.Bh7+?
      • 1...f5
        • 2.Bxf5#
        • 2.Qxf5#
      • 1...Sg6!
    • 1.exd7+?
      • 1...Be6
        • 2.Rxe6#
      • 1...Be5!
  • Keys
    • 1.Kg4!
      • threat
        • 2.Qf5#
      • 1...f5+
        • 2.Qxf5#
      • 1...Bxb5
        • 2.exd7#
      • 1...Bd5
        • 2.Qxe2#
      • 1...Bc5
        • 2.exd7#
      • 1...Be5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • B(c);N_GUARD,P_SPINB(d)::R(H)+P(G),XP(h)
    • B(d);N_GUARD,P_SPINB(c)::R(H)+P(G),XP(h)
  • Tries
    • Try
      • B(I);CHECK
      • Refutation
        • S(i);P_SPINS(i)
    • Try
      • P(G);CHECK,XP(h)
      • Vars
        • B(c);N_GUARD,P_SPINB(d)::R(H),XB(c)
      • Refutation
        • B(d);P_SPINB(c)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • QAB1(D)
    • Vars
      • P(g);CHECK::QAB1(D),XP(g)
      • B(c);N_GUARD,P_SPINB(d),XQ(D)::R(H)+P(G),XP(h)
      • B(c);OGATE,P_SPINB(d),SBLOCK::QAR2(D),XS(a)
      • B(d);N_GUARD,P_SPINB(c)::R(H)+P(G),XP(h)
      • B(d);P_SPINB(c),SBLOCK::QAB(D)
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Developed and maintained by Brian Stephenson.
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