MESON Chess Problem Database

Problem Display
PID: 157140 (2b2rr1/p1Qn4/q7/2N1np1R/4Bk2/3p1ppK/7B/4R3 w - - 0 1)

Ellerman, Arnoldo

Pittsburgh Gazette-Times, 1913

2b2rr1/p1Qn4/q7/2N1np1R/4Bk2/3p1ppK/7B/4R3

#2

7 + 12

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Se6#
    • 1...Qb7
      • 2.Sxd3#
      • 2.Se6#
    • 1...Qa1
      • 2.Sxd3#
      • 2.Se6#
    • 1...Qa2
      • 2.Sxd3#
    • 1...Qa3
      • 2.Se6#
    • 1...Qa4
      • 2.Sxd3#
      • 2.Se6#
    • 1...Qa5
      • 2.Sxd3#
      • 2.Se6#
    • 1...Qb6
      • 2.Sxd3#
    • 1...Qc6
      • 2.Sxd3#
    • 1...Qe6
      • 2.Sxd3#
      • 2.Sxe6#
    • 1...Qf6
      • 2.Sxd3#
    • 1...Qg6
      • 2.Sxd3#
    • 1...Qh6
      • 2.Sxd3#
    • 1...Rd8
      • 2.Rxf5#
    • 1...Re8
      • 2.Rxf5#
    • 1...Rh8
      • 2.Bxg3#
    • 1...fxe4
      • 2.Rxe4#
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qd2#
      • 1...Qxa5
        • 2.Se6#
      • 1...fxe4
        • 2.Rxe4#
      • 1...Sc4
        • 2.Sxd3#
      • 1...Sg4
        • 2.Bxg3#
      • 1...Sc6
        • 2.Se6#
      • 1...Sg6
        • 2.Bxg3#
      • 1...Sf7
        • 2.Rxf5#
      • 1...d2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 11
  • Sets
    • Q(g);N_GUARD::S(E)
    • Q(g);N_GUARD::S(E),XP(a)
    • Q(g);N_GUARD,P_PINR(F)::S(E),XP(a)
    • R(k);N_GUARD::R1(F),XP(f)
    • R(l);N_GUARD,P_PINR(F)::B(B),XP(c)
    • P(f);OGATE,XB(D)::R1(A),XP(f)
  • Actual
    • Q(G);N_PINS(e)
    • Threat
      • QAB(G)
    • Vars
      • Q(g);N_GUARD,XQ(G)::S(E)
      • P(f);OGATE,XB(D)::R1(A),XP(f)
      • S(e);N_GUARD,S_CUTQ(g)::S(E),XP(a)
      • S(e);S_CUTR(l)::B(B),XP(c)
      • S(e);S_CUTQ(g)::S(E)
      • S(e);S_CUTR(k)::R1(F),XP(f)
      • P(a);::QAB(G),XP(a)
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