MESON Chess Problem Database

Problem Display
PID: 227903 (1k1nn3/R2Q4/6K1/8/8/8/8/8 w - - 0 1)

Elekes, Dezso

Magyar Sakkvilag, 1926

1k1nn3/R2Q4/6K1/8/8/8/8/8

#2

3 + 3

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qb7#
    • 1...Se6
      • 2.Qb7#
    • 1...Sb7
      • 2.Qxb7#
    • 1...Sf7
      • 2.Qb7#
    • 1...Sd6
      • 2.Qc7#
    • 1...Sf6
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
    • 1...Sg7
      • 2.Qc7#
  • Tries
    • 1.Kh6?
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Sf6
        • 2.Qc7#
      • 1...Sg7
        • 2.Qc7#
      • 1...Sf7+!
    • 1.Kh7?
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Sf7
        • 2.Qb7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Sg7
        • 2.Qc7#
      • 1...Sf6+!
    • 1.Rb7+?
      • 1...Ka8
        • 2.Qc8#
      • 1...Sxb7!
    • 1.Qf7?
      • 1...Kc8
        • 2.Ra8#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Sf6
        • 2.Qc7#
      • 1...Sg7
        • 2.Qc7#
      • 1...Sxf7!
  • Keys
    • 1.Qe7!
      • 1...Kc8
        • 2.Ra8#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Se6
        • 2.Qb7#
      • 1...Sf7
        • 2.Qb7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Sf6
        • 2.Qc7#
      • 1...Sg7
        • 2.Qc7#

This anticipates 87928(1962)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
    • S(c);N_GUARD::QAB1(C)
    • S(c);N_GUARD::QAB1(C),XS(c)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(b);N_GUARD::QAR1(C),XS(b)
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(b);N_GUARD::QAR1(C)
        • S(c);N_GUARD::QAB1(C)
      • Refutation
        • S(b);CHECK
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(b);N_GUARD::QAR1(C),XS(b)
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(b);N_GUARD::QAR1(C)
        • S(c);N_GUARD::QAB1(C)
      • Refutation
        • S(c);CHECK
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • S(b);XR(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::R(B)
        • S(b);N_GUARD::QAR1(C),XS(b)
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(b);N_GUARD::QAR1(C)
        • S(c);N_GUARD::QAB1(C)
      • Refutation
        • S(b);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::R(B)
      • S(b);N_GUARD::QAR1(C),XS(b)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • S(b);N_GUARD::QAR1(C)
      • S(c);N_GUARD::QAB1(C)
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