MESON Chess Problem Database

Problem Display
PID: 31052 (6B1/2B3R1/5k1n/5P1p/7P/2K2QP1/8/8 w - - 0 1)

Dubbe, Friedrich

Oesterreichische Lesehalle, 1881

6B1/2B3R1/5k1n/5P1p/7P/2K2QP1/8/8

#2

8 + 3

3429 Friedrich Dubbe ein Deutscher Problemmeister 1938

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Rf7#
    • 1...Sf7
      • 2.Rxf7#
  • Tries
    • 1.Bd8+?
      • 1...Ke5
        • 2.Qd5#
        • 2.Qf4#
      • 1...Kxg7!
    • 1.Qe2?
      • threat
        • 2.Qe5#
      • 1...Kxf5
        • 2.Qf3#
        • 2.Qe5#
        • 2.Qe6#
      • 1...Sg4
        • 2.Rf7#
      • 1...Sf7
        • 2.Rxf7#
      • 1...Kxg7!
    • 1.Qe4?
      • threat
        • 2.Be5#
        • 2.Rg6#
        • 2.Qe5#
      • 1...Sxf5
        • 2.Be5#
        • 2.Qe5#
      • 1...Sxg8
        • 2.Be5#
        • 2.Qe5#
      • 1...Sg4
        • 2.Rg6#
        • 2.Rf7#
      • 1...Sf7
        • 2.Rg6#
        • 2.Rxf7#
      • 1...Kxg7!
    • 1.Qg4?
      • threat
        • 2.Qg5#
        • 2.Qg6#
      • 1...Sxg4
        • 2.Rf7#
      • 1...Sf7
        • 2.Rxf7#
      • 1...hxg4!
    • 1.Qd5?
      • threat
        • 2.Qe5#
      • 1...Sf7
        • 2.Rxf7#
        • 2.Qxf7#
      • 1...Sg4
        • 2.Rf7#
        • 2.Qf7#
      • 1...Kxg7!
    • 1.Qxh5?
      • threat
        • 2.Qg6#
        • 2.Qg5#
      • 1...Sf7
        • 2.Rxf7#
        • 2.Qxf7#
      • 1...Kxg7!
    • 1.Qc6+?
      • 1...Kxf5
        • 2.Bh7#
        • 2.Rg5#
        • 2.Qf3#
        • 2.Qe6#
        • 2.Qg6#
      • 1...Kxg7!
    • 1.Qe3?
      • threat
        • 2.Qg5#
        • 2.Qe5#
      • 1...Kxf5
        • 2.Qf4#
        • 2.Qf3#
        • 2.Qe5#
        • 2.Qe6#
      • 1...Sg4
        • 2.Rf7#
        • 2.Qg5#
      • 1...Sf7
        • 2.Rxf7#
      • 1...Kxg7!
    • 1.Qf4?
      • threat
        • 2.Be5#
        • 2.Qe5#
        • 2.Qg5#
      • 1...Sf7
        • 2.Rxf7#
      • 1...Sg4
        • 2.Rf7#
        • 2.Qg5#
      • 1...Kxg7!
  • Keys
    • 1.Qa8!
      • 1...Kxf5
        • 2.Qf3#
      • 1...Kxg7
        • 2.Be5#
      • 1...Sxf5
        • 2.Qf8#
      • 1...Sxg8
        • 2.Qf8#
      • 1...Sf7
        • 2.Rxf7#
      • 1...Sg4
        • 2.Rf7#
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::R1(G)
    • S(c);N_GUARD::R1(G),XS(c)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(c);N_GUARD::R1(G)
        • S(c);N_GUARD::R1(G),XS(c)
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD,XQ(B)::R1(G)
        • S(c);N_GUARD::R1(G),XS(c)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(B);XP(a)
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD::R1(G),XS(c)
      • Refutation
        • K(b);S_FLIGHT,XR(G)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);N_GUARD::R1(G),XS(c)
      • Refutation
        • K(b);S_FLIGHT,XR(G)
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(E)::QAR2(B)
      • K(b);S_FLIGHT,XR(G)::B(F)
      • S(c);N_GUARD,SBLOCK,XP(E)::QAR2(B)
      • S(c);N_GUARD,XB(H)::QAR2(B)
      • S(c);N_GUARD::R1(G),XS(c)
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