MESON Chess Problem Database

Problem Display
PID: 120140 (4B3/r3n3/2Qp1p1n/p4k1r/2p2N2/2K1PN1P/6Pb/8 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Deutsche Schachzeitung, 1909

4B3/r3n3/2Qp1p1n/p4k1r/2p2N2/2K1PN1P/6Pb/8

#2

8 + 10

15 British Chess Magazine 1911
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Bd7#
    • 1...Rd7
      • 2.Bxd7#
    • 1...Ra8
      • 2.Bd7#
    • 1...Sf7
      • 2.g4#
    • 1...Shg8
      • 2.g4#
    • 1...Sd5+
      • 2.Qxd5#
    • 1...Sxc6
      • 2.Bg6#
    • 1...Sg6
      • 2.Bxg6#
    • 1...Sc8
      • 2.Bg6#
      • 2.Qd5#
    • 1...Seg8
      • 2.Bg6#
      • 2.Qd5#
    • 1...d5
      • 2.Qe6#
  • Tries
    • 1.Qb5+?
      • 1...Sd5+
        • 2.Qxd5#
      • 1...d5
        • 2.Qb1#
      • 1...Ke4!
    • 1.Qxc4?
      • threat
        • 2.Qd3#
        • 2.Qe6#
      • 1...Sd5+
        • 2.Qxd5#
      • 1...Rxh3
        • 2.Qe6#
      • 1...Bxf4
        • 2.e4#
      • 1...d5
        • 2.Qd3#
      • 1...Rc7!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Be6#
      • 1...Sd5+
        • 2.Qxd5#
      • 1...Bxf4
        • 2.e4#
      • 1...Sxf7
        • 2.g4#
      • 1...Sxc6
        • 2.Bg6#
      • 1...d5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(i);N_GUARD::B(H)
    • R(i);N_GUARD::B(H),XR(i)
    • S(h);N_GUARD::P(A)
    • S(j);CHECK,N_GUARD::QAR2(G),XS(j)
    • S(j);N_GUARD,XQ(G)::B(H)
    • S(j);N_GUARD::B(H),XS(j)
    • P(f);OGATE::QAB1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(j);CHECK,N_GUARD,P_SPINS(j)::QAR2(G),XS(j)
        • P(f);P_SPINP(f)::QAB(G)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(j);CHECK,N_GUARD::QAR2(G),XS(j)
        • R(e);XP(E)::QAB1(G)
        • B(a);SBLOCK,XS(F)::P(C)
        • P(f);::QAB(G)
      • Refutation
        • R(i);P_PINQ(G)
  • Actual
    • B(H);
    • Threat
      • B(H)
    • Vars
      • S(j);CHECK,N_GUARD::QAR2(G),XS(j)
      • B(a);SBLOCK,XS(F)::P(C)
      • S(h);N_GUARD,XB(H)::P(A)
      • S(j);N_GUARD,XQ(G)::B(H)
      • P(f);OGATE::QAB1(G)
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