MESON Chess Problem Database

Problem Display
PID: 145569 (b1Q2NK1/b7/3pp1Np/1P1k1P2/7r/2P5/4Pn1q/1B6 w - - 0 1)

Ellerman, Arnoldo

1st HM., Good Companions (October), 1917

b1Q2NK1/b7/3pp1Np/1P1k1P2/7r/2P5/4Pn1q/1B6

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Se7#
    • 1...Bd4
      • 2.c4#
    • 1...Bc5
      • 2.Qxe6#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Se4
      • 2.Ba2#
    • 1...Sg4
      • 2.e4#
    • 1...e5
      • 2.Se7#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Se7#
        • 2.Sf6#
      • 1...exf5
        • 2.Sf6#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Sd3
        • 2.Sf6#
      • 1...Qg1
        • 2.Sf6#
      • 1...Qg3
        • 2.Sf6#
      • 1...Qe5
        • 2.Se7#
      • 1...Qg2
        • 2.Sf6#
      • 1...Rg4
        • 2.Sf6#
      • 1...Bd4
        • 2.Se7#
        • 2.c4#
      • 1...Se4
        • 2.Se7#
        • 2.Ba2#
      • 1...Sg4
        • 2.Se7#
        • 2.e4#
      • 1...Bc5!
    • 1.Ba2+?
      • 1...Rc4
        • 2.Qxc4#
      • 1...Ke4!
    • 1.Qxa8+?
      • 1...Kc5
        • 2.Qc6#
      • 1...Kc4!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Sf6#
      • 1...Bc5
        • 2.Qxe6#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Qe5
        • 2.Se7#
      • 1...Bd4
        • 2.c4#
      • 1...Se4
        • 2.Ba2#
      • 1...Sg4
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK::S(F)
    • B(h);SBLOCK,S_CUTR(c)::P(C)
    • B(h);SBLOCK::QAB1(G),XP(f)
    • B(i);N_GUARD::QAB1(G),XB(i)
    • S(a);SBLOCK,S_CUTR(c)::B(A)
    • S(a);N_GUARD,S_CUTR(c)::P(B)
    • P(f);SBLOCK::S(F)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XP(E)::S(H)
        • B(i);N_GUARD::QAB1(G),XB(i)
        • S(a);::S(H)
        • Q(b);P_PINS(F)::S(H)
        • Q(b);::S(F)
        • R(c);P_PINS(F)::S(H)
      • Refutation
        • B(h);
    • Try
      • B(A);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(G),XR(c)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);CHECK,XB(i)
      • Vars
        • K(d);P-FLIGHT::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • B(h);SBLOCK::QAB1(G),XP(f)
      • B(i);N_GUARD::QAB1(G),XB(i)
      • Q(b);SBLOCK::S(F)
      • B(h);SBLOCK,S_CUTR(c)::P(C)
      • S(a);SBLOCK,S_CUTR(c)::B(A)
      • S(a);N_GUARD,S_CUTR(c)::P(B)
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