MESON Chess Problem Database

Problem Display
PID: 187914 (8/3n1p2/5P1p/nN2p2R/4k3/3N4/Q3K3/8 w - - 0 1)

Preiswerk, Walther Edouard

Schweizerische Schachzeitung, 1910

8/3n1p2/5P1p/nN2p2R/4k3/3N4/Q3K3/8

#2

6 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qa8#
    • 1...Sc4
      • 2.Qxc4#
      • 2.Qa8#
    • 1...Sb7
      • 2.Qc4#
    • 1...Sc5
      • 2.Rxe5#
    • 1...Sb6
      • 2.Rxe5#
    • 1...Sxf6
      • 2.Rxe5#
    • 1...Sb8
      • 2.Rxe5#
    • 1...Sf8
      • 2.Rxe5#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Rh4#
      • 1...Sxf6
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...fxe6!
    • 1.Qa4+?
      • 1...Sc4
        • 2.Qxc4#
        • 2.Qa8#
      • 1...Kd5!
    • 1.Qxa5?
      • threat
        • 2.Qa8#
      • 1...Sxf6
        • 2.Rxe5#
      • 1...Sc5
        • 2.Rxe5#
      • 1...Sb6
        • 2.Rxe5#
      • 1...Sb8
        • 2.Rxe5#
      • 1...Kd5!
  • Keys
    • 1.Qc2!
      • 1...Kd5
        • 2.Sf4#
      • 1...Sxf6
        • 2.Rxe5#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sb7
        • 2.Qc4#
        • 2.Qc6#
      • 1...Sc5
        • 2.Rxe5#
      • 1...Sb6
        • 2.Rxe5#
      • 1...Sb8
        • 2.Rxe5#
      • 1...Sf8
        • 2.Rxe5#

This is a version of 182492

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(b);OGATE::QAB(A)
    • S(b);N_GUARD::QAR2(A)
    • S(e);N_GUARD::R1(E),XP(c)
    • S(e);N_GUARD,XP(F)::R1(E),XP(c)
  • Tries
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • R(E)
      • Refutation
        • P(f);N_SPINP(c),XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • Q(A);XS(b)
      • Threat
        • QAB(A)
      • Vars
        • S(e);N_GUARD,XP(F)::R1(E),XP(c)
        • S(e);N_GUARD::R1(E),XP(c)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P_SPINP(c),S_FLIGHT::S(C)
      • S(e);N_GUARD,XP(F)::R1(E),XP(c)
      • S(b);N_GUARD::QAB(A),XS(b)
      • S(b);N_GUARD::QAB(A)
      • S(b);N_GUARD::QAR2(A),XS(b)
      • S(e);N_GUARD::R1(E),XP(c)
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