MESON Chess Problem Database

Problem Display
PID: 53537 (3K2n1/8/2pk4/3b1R2/3Q4/8/8/8 w - - 0 1)

Schonberger, Tibor

1st Prize, Match: USA - Yugoslavia, 1933

3K2n1/8/2pk4/3b1R2/3Q4/8/8/8

#2

3 + 4

268 Chess Life 1955
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe5#
    • 1...Sf6
      • 2.Rxf6#
    • 1...Sh6
      • 2.Rf6#
    • 1...Se7
      • 2.Rf6#
    • 1...c5
      • 2.Qxd5#
  • Tries
    • 1.Qg7?
      • 1...Ke6
        • 2.Qe5#
        • 2.Qd7#
      • 1...Sf6
        • 2.Qe7#
      • 1...Bh1
        • 2.Qe5#
        • 2.Qd7#
      • 1...Ba2
        • 2.Qe5#
        • 2.Qd7#
      • 1...Bg2
        • 2.Qe5#
        • 2.Qd7#
      • 1...Bb3
        • 2.Qe5#
        • 2.Qd7#
      • 1...Bf3
        • 2.Qe5#
        • 2.Qd7#
      • 1...Bc4
        • 2.Qe5#
        • 2.Qd7#
      • 1...Be4
        • 2.Qe5#
        • 2.Qd7#
      • 1...Be6
        • 2.Qe5#
        • 2.Qg3#
        • 2.Qc7#
      • 1...Bf7
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...c5
        • 2.Qd7#
      • 1...Kc5!
    • 1.Qf4+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Kc5!
  • Keys
    • 1.Qa7!
      • 1...Ke6
        • 2.Qd7#
      • 1...c5
        • 2.Qd7#
      • 1...Sf6
        • 2.Qe7#
      • 1...Bh1
        • 2.Qd7#
      • 1...Ba2
        • 2.Qd7#
      • 1...Bg2
        • 2.Qd7#
      • 1...Bb3
        • 2.Qd7#
      • 1...Bf3
        • 2.Qd7#
      • 1...Bc4
        • 2.Qd7#
      • 1...Be4
        • 2.Qd7#
      • 1...Be6
        • 2.Qc5#
        • 2.Qb8#
        • 2.Qc7#
      • 1...Bf7
        • 2.Qd7#
      • 1...Sh6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#

This anticipates 170480(1957)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINB(a),P-FLIGHT::QAR1(A)
    • S(d);N_GUARD::R(B),XS(d)
    • S(d);N_GUARD::R(B)
    • P(b);N_GUARD::QAR1(A),XB(a)
  • Tries
    • Try
      • Q(A);N_PINB(a)
      • Vars
        • S(d);N_GUARD::QAB1(A)
        • B(a);::QAB1(A)
        • S(d);N_GUARD::QAB1(A),XS(d)
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT
  • Actual
    • Q(A);N_PINB(a)
    • Vars
      • K(c);P-FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAR1(A)
      • S(d);N_GUARD::QAB1(A)
      • B(a);::QAR1(A)
      • S(d);N_GUARD::QAB1(A),XS(d)
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