MESON Chess Problem Database

Problem Display
PID: 261537 (8/6p1/p5p1/K1N3B1/3k4/3N2p1/Q5P1/8 w - - 0 1)

Johner, Hans

Neue Zurcher Zeitung, 1959

8/6p1/p5p1/K1N3B1/3k4/3N2p1/Q5P1/8

#2

6 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sb4?
      • 1...Kxc5
        • 2.Qd5#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kc3!
    • 1.Be3+?
      • 1...Kc3
        • 2.Qb3#
      • 1...Kxe3!
    • 1.Bf4?
      • 1...Kc3
        • 2.Be5#
      • 1...g5!
  • Keys
    • 1.Sf4!
      • 1...Kc3
        • 2.Se2#
      • 1...Ke3
        • 2.Sfe6#
      • 1...Kxc5
        • 2.Qd5#
      • 1...Ke5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(b);N_GUARD,S_FLIGHT,XS(E)::QAR1(A)
        • K(b);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(F);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XB(F)
    • Try
      • B(F);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(F)
      • Refutation
        • P(d);
  • Actual
    • S(C);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::S(C)
      • K(b);N_GUARD,S_FLIGHT::B(F)+S(C)
      • K(b);N_GUARD,S_FLIGHT,XS(E)::QAR1(A)
      • K(b);N_GUARD,S_FLIGHT::QAR1(A)
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