MESON Chess Problem Database

Problem Display
PID: 169232 (8/6K1/8/7k/5Q1N/8/4b1P1/7r w - - 0 1)

Kratschmer, Ralf

5th Place, SuperProblem 181. TT, 2017

8/6K1/8/7k/5Q1N/8/4b1P1/7r

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh4
      • 2.Qf5#
    • 1...Bg4
      • 2.Qh6#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qg5#
        • 2.Qf5#
        • 2.g4#
      • 1...Rg1
        • 2.Qg5#
        • 2.Qh4#
        • 2.Qf5#
      • 1...Rh4
        • 2.Qg5#
        • 2.Qxh4#
        • 2.Qf5#
      • 1...Bd3
        • 2.Qg5#
        • 2.g4#
      • 1...Bxf3!
    • 1.Sf5?
      • threat
        • 2.Sg3#
      • 1...Bg4
        • 2.Qh6#
      • 1...Rh3!
    • 1.g4+?
      • 1...Bxg4
        • 2.Qh6#
      • 1...Kxh4!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qf5#
      • 1...Rf1
        • 2.Qh4#
      • 1...Bd3
        • 2.g4#
      • 1...Bg4
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK,XS(C)::QAR2(B)
    • B(b);SBLOCK::QAR1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Refutation
        • B(b);XS(C)
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • B(b);SBLOCK::QAR1(B)
      • Refutation
        • R(a);
    • Try
      • P(A);CHECK
      • Vars
        • B(b);SBLOCK,XP(A)::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR2(B)
    • Vars
      • R(a);N_GUARD::QAR1(B)
      • B(b);N_GUARD::P(A)
      • B(b);SBLOCK::QAR1(B)
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