MESON Chess Problem Database

Problem Display
PID: 187711 (n2Br2q/1Q2np1p/8/R2BkN1K/2p2p1N/8/rb6/8 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Chess Weekly, 1909

n2Br2q/1Q2np1p/8/R2BkN1K/2p2p1N/8/rb6/8

#2

7 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd8
      • 2.Qxe7#
    • 1...Rf8
      • 2.Qxe7#
    • 1...Rg8
      • 2.Qxe7#
    • 1...Sxd5
      • 2.Qxd5#
  • Tries
    • 1.Bxc4+?
      • 1...Kf6
        • 2.Qc6#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Rxa5!
    • 1.Qxb2+?
      • 1...c3
        • 2.Qxc3#
      • 1...Rxb2!
    • 1.Qc7+?
      • 1...Kf6
        • 2.Qd6#
      • 1...Sxc7!
    • 1.Qd7?
      • threat
        • 2.Qd6#
      • 1...Kf6
        • 2.Qd6#
      • 1...Rxd8
        • 2.Qxe7#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sxf5
        • 2.Sf3#
      • 1...Qf6
        • 2.Sf3#
      • 1...Sc8
        • 2.Sf3#
      • 1...Ba3!
    • 1.Qb8+?
      • 1...Kf6
        • 2.Qd6#
      • 1...Sc7!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qd6#
      • 1...Kf6
        • 2.Qd6#
      • 1...Rxd8
        • 2.Qxe7#
      • 1...Sxd5
        • 2.Qe1#
      • 1...Sxf5
        • 2.Sf3#
      • 1...Qf6
        • 2.Qe1#
      • 1...Ba3
        • 2.Qc3#
      • 1...Sc8
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(j);N_GUARD,XB(G)::QAR2(F),XS(f)
    • R(j);N_GUARD::QAR2(F),XS(f)
    • S(f);OGATE,P_SPINS(f),XB(C)::QAR1(F),XS(f)
  • Tries
    • Try
      • B(C);CHECK,XP(c)
      • Vars
        • K(e);P_SPINS(f),S_FLIGHT::QAR(F)
        • S(f);N_GUARD,P_SPINS(f)::QAR1(F),XS(f)
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(F);CHECK,XB(b)
      • Vars
        • P(c);P_SPINP(c)::QAB(F),XP(c)
      • Refutation
        • R(a);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P_SPINS(f),S_FLIGHT::QAR2(F)
      • Refutation
        • S(i);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(e);P_SPINS(f),S_FLIGHT::QAR2(F)
        • R(j);N_GUARD,XB(G)::QAR2(F),XS(f)
        • S(f);OGATE,P_SPINS(f),XB(C)::QAR1(F),XS(f)
        • S(f);XS(D)::S(A)
        • Q(k);SBLOCK::S(A)
        • S(f);::S(A)
      • Refutation
        • B(b);
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P_SPINS(f),S_FLIGHT::QAR2(F)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(e);P_SPINS(f),S_FLIGHT::QAR2(F)
      • R(j);N_GUARD,XB(G)::QAR2(F),XS(f)
      • S(f);P_SPINS(f),XB(C)::QAR(F)
      • S(f);SBLOCK,XS(D)::S(A)
      • Q(k);SBLOCK::QAR(F)
      • B(b);N_GUARD::QAB(F)
      • S(f);::QAR(F)
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