MESON Chess Problem Database

Problem Display
PID: 225194 (1n2B3/2B4b/4p2N/1Np1P3/2P1kp1Q/4p2P/2P1p1P1/K2n4 w - - 0 1)

Ellerman, Arnoldo

Freie Presse, 1912

1n2B3/2B4b/4p2N/1Np1P3/2P1kp1Q/4p2P/2P1p1P1/K2n4

#2

11 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Bxg6#
    • 1...Bg8
      • 2.Bg6#
    • 1...Sa6
      • 2.Bc6#
    • 1...Sc6
      • 2.Bxc6#
  • Tries
    • 1.Sg8?
      • threat
        • 2.Qxh7#
      • 1...Bxg8
        • 2.Bg6#
      • 1...Bf5
        • 2.Sf6#
      • 1...Bg6
        • 2.Bxg6#
      • 1...Kf5!
    • 1.Qe7?
      • threat
        • 2.Qxh7#
      • 1...f3
        • 2.Qh4#
      • 1...Bg6
        • 2.Bxg6#
      • 1...Bg8
        • 2.Bg6#
      • 1...Bf5!
    • 1.Qd8?
      • threat
        • 2.Qd3#
      • 1...f3
        • 2.Qh4#
      • 1...Sb2
        • 2.Sc3#
      • 1...Sf2
        • 2.Sc3#
      • 1...Sd7
        • 2.Qa8#
      • 1...e1S!
    • 1.Qh5?
      • threat
        • 2.Qf3#
      • 1...f3
        • 2.Qxf3#
        • 2.Qg4#
        • 2.Qh4#
      • 1...e1S!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qxh7#
      • 1...Kf5
        • 2.Sd6#
      • 1...f3
        • 2.Sh6#
      • 1...Bf5
        • 2.Sf6#
      • 1...Bg6
        • 2.Bxg6#
      • 1...Bg8
        • 2.Bg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(h);N_GUARD::B(K),XB(h)
    • B(h);N_GUARD::B(K)
    • S(i);N_GUARD::B(K)
    • S(i);N_GUARD::B(K),XS(i)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAB(F),XB(h)
      • Vars
        • B(h);N_GUARD,XS(I)::B(K)
        • B(h);SBLOCK::S(I)
        • B(h);N_GUARD::B(K),XB(h)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAB(F),XB(h)
      • Vars
        • P(e);OGATEB::QAR(F)
        • B(h);N_GUARD::B(K),XB(h)
        • B(h);N_GUARD::B(K)
      • Refutation
        • B(h);
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAB1(F)
      • Vars
        • P(e);OGATEB::QAR(F)
        • S(a);N_GUARD::S(G)
        • S(i);OGATE::QAB(F)
      • Refutation
        • P(b);
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAB1(F)
      • Refutation
        • P(b);
  • Actual
    • S(I);N_PINP(e)
    • Threat
      • QAB(F),XB(h)
    • Vars
      • K(d);S_FLIGHT::S(G)
      • P(e);::QAR(F)+S(I)
      • B(h);SBLOCK::S(I)
      • B(h);N_GUARD::B(K),XB(h)
      • B(h);N_GUARD::B(K)
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