MESON Chess Problem Database

Problem Display
PID: 205571 (8/8/6R1/4p2k/6R1/5nK1/4N3/8 w - - 0 1)

Schonberger, Tibor

L'Echiquier Marseillais, 1925

8/8/6R1/4p2k/6R1/5nK1/4N3/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.R4g5#
    • 1...Sg1
      • 2.R4g5#
    • 1...Sd2
      • 2.R4g5#
    • 1...Sh2
      • 2.R4g5#
    • 1...Sd4
      • 2.R4g5#
    • 1...Sh4
      • 2.R4g5#
    • 1...Sg5
      • 2.R4xg5#
    • 1...e4
      • 2.Sf4#
  • Tries
    • 1.Kh3?
      • threat
        • 2.Sg3#
      • 1...Sg5+
        • 2.R4xg5#
      • 1...Sg1+!
    • 1.Sc1?
      • 1...Sg5
        • 2.R4xg5#
      • 1...Se1
        • 2.R4g5#
      • 1...Sg1
        • 2.R4g5#
      • 1...Sd2
        • 2.R4g5#
      • 1...Sh2
        • 2.R4g5#
      • 1...Sd4
        • 2.R4g5#
      • 1...Sh4
        • 2.R4g5#
      • 1...e4!
    • 1.Sg1?
      • 1...Sxg1
        • 2.R4g5#
      • 1...Sg5
        • 2.R4xg5#
      • 1...Se1
        • 2.R4g5#
      • 1...Sd2
        • 2.R4g5#
      • 1...Sh2
        • 2.R4g5#
      • 1...Sd4
        • 2.R4g5#
      • 1...Sh4
        • 2.R4g5#
      • 1...e4!
    • 1.Sc3?
      • 1...Sg5
        • 2.R4xg5#
      • 1...Se1
        • 2.R4g5#
      • 1...Sg1
        • 2.R4g5#
      • 1...Sd2
        • 2.R4g5#
      • 1...Sh2
        • 2.R4g5#
      • 1...Sd4
        • 2.R4g5#
      • 1...Sh4
        • 2.R4g5#
      • 1...e4!
    • 1.Rg7?
      • threat
        • 2.Rh7#
      • 1...Sg5
        • 2.Rh4#
      • 1...Kh6!
  • Keys
    • 1.Rg8!
      • threat
        • 2.Rh8#
      • 1...Kh6
        • 2.Rh8#
      • 1...Sg5
        • 2.Rh4#

There are these versions: 227781

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
    • P(b);N_GUARD::S(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • S(A)
      • Vars
        • S(a);CHECK,N_GUARD::R1(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • S(A);
      • Vars
        • S(a);N_GUARD::R1(C),XS(a)
        • S(a);N_GUARD::R1(C)
      • Refutation
        • P(b);
    • Try
      • S(A);
      • Vars
        • S(a);N_GUARD,XS(A)::R1(C)
        • S(a);N_GUARD::R1(C),XS(a)
        • S(a);N_GUARD::R1(C)
      • Refutation
        • P(b);
    • Try
      • S(A);
      • Vars
        • S(a);N_GUARD::R1(C),XS(a)
        • S(a);N_GUARD::R1(C)
      • Refutation
        • P(b);
    • Try
      • R(D);
      • Threat
        • R(D)
      • Vars
        • S(a);N_GUARD::R1(C)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • R(D);
    • Threat
      • R(D)
    • Vars
      • K(c);P-FLIGHT::R(D)
      • S(a);N_GUARD::R1(C)
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