MESON Chess Problem Database

Problem Display
PID: 189756 (6n1/3p2Q1/3B4/4np2/1p3k1p/1Pp2P1p/2K4P/5R2 w - - 0 1)

Dunka, Gyorgy Jusztin

Die Schachwelt (Berlin), 1912

6n1/3p2Q1/3B4/4np2/1p3k1p/1Pp2P1p/2K4P/5R2

#2

7 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qxe5#
    • 1...Sf6
      • 2.Qh6#
    • 1...Sh6
      • 2.Qxh6#
    • 1...Se7
      • 2.Qh6#
  • Tries
    • 1.Rf2?
      • 1...Sf6
        • 2.Qh6#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...Ke3!
    • 1.Qf6?
      • 1...Ke3
        • 2.Qxe5#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...Sxf6!
    • 1.Qh8?
      • 1...Ke3
        • 2.Qxe5#
      • 1...Sf6
        • 2.Qh6#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...Kg5!
    • 1.Qg3+?
      • 1...Ke3
        • 2.Qxe5#
      • 1...hxg3!
    • 1.Qg6?
      • 1...Sf6
        • 2.Qh6#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...Ke3!
  • Keys
    • 1.Be7!
      • threat
        • 2.Bg5#
        • 2.Qg5#
      • 1...Ke3
        • 2.Qxe5#
      • 1...Sxf3
        • 2.Qd4#
      • 1...Sxe7
        • 2.Qh6#
      • 1...Sd3
        • 2.Bg5#
        • 2.Qd4#
      • 1...Sc4
        • 2.Bg5#
        • 2.Qd4#
      • 1...Sg4
        • 2.Bg5#
        • 2.Qd4#
      • 1...Sc6
        • 2.Bg5#
      • 1...Sg6
        • 2.Qd4#
      • 1...Sf7
        • 2.Qd4#
      • 1...Sf6
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINS(f),S_FLIGHT::QAR2(G),XS(f)
    • S(i);N_GUARD::QAB(G)
    • S(i);N_GUARD::QAB(G),XS(i)
  • Tries
    • Try
      • R(A);
      • Vars
        • S(i);N_GUARD::QAB(G)
        • S(i);N_GUARD::QAB(G),XS(i)
      • Refutation
        • K(d);N_SPINS(f),S_FLIGHT
    • Try
      • Q(G);P_PINP(g)
      • Vars
        • K(d);N_SPINP(g),N_SPINS(f),S_FLIGHT::QAR2(G),XS(f)
        • S(i);N_GUARD::QAB(G),XS(i)
        • S(i);N_GUARD::QAB(G)
      • Refutation
        • S(i);N_SPINP(g),XQ(G)
    • Try
      • Q(G);
      • Vars
        • K(d);N_SPINS(f),S_FLIGHT::QAR2(G),XS(f)
        • S(i);N_GUARD::QAB(G)
        • S(i);N_GUARD::QAB(G),XS(i)
      • Refutation
        • K(d);N_SPINS(f),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);N_SPINS(f),OGATE,S_FLIGHT::QAR2(G),XS(f)
      • Refutation
        • P(e);XQ(G)
    • Try
      • Q(G);
      • Vars
        • S(i);N_GUARD::QAB(G)
        • S(i);N_GUARD::QAB(G),XS(i)
      • Refutation
        • K(d);N_SPINS(f),S_FLIGHT
  • Actual
    • B(F);N_PINS(f)
    • Threat
      • DUALS(2)
    • Vars
      • K(d);S_FLIGHT::QAR2(G),XS(f)
      • S(f);OGATE,P_SPINS(f),XP(E)::QAR2(G)
      • S(i);N_GUARD,XB(F)::QAB(G)
      • S(f);::B(F)
      • S(f);OGATE::QAR2(G)
      • S(i);N_GUARD::QAB(G)
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