MESON Chess Problem Database

Problem Display
PID: 15883 (8/4Q3/8/4N3/3k1N2/1R4K1/n7/8 w - - 0 1)

Borovik, Boris V

The Problemist, 1988

8/4Q3/8/4N3/3k1N2/1R4K1/n7/8

#2

5 + 2

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kf3?
      • threat
        • 2.Rd3#
        • 2.Qd6#
      • 1...Sc1
        • 2.Qd6#
      • 1...Sc3
        • 2.Rb4#
      • 1...Sb4!
    • 1.Sg4?
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Rb4#
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kc4!
    • 1.Seg6?
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Rb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kc4!
    • 1.Sd7?
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Rb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kc4!
    • 1.Sf7?
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Rb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kc4!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qa7#
      • 1...Kxe3
        • 2.Sf3#

Anticipated by 224525(1887)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR2(E)
        • S(a);N_GUARD,SBLOCK::R(A)
      • Refutation
        • S(a);
    • Try
      • S(D);
      • Vars
        • S(a);N_GUARD::QAR2(E)
        • S(a);N_GUARD::QAR2(E),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • S(a);N_GUARD::QAR2(E)
        • S(a);N_GUARD,SBLOCK::R(A)
        • S(a);N_GUARD::QAR2(E),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • S(a);N_GUARD::QAR2(E)
        • S(a);N_GUARD,SBLOCK::R(A)
        • S(a);N_GUARD::QAR2(E),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • S(a);N_GUARD::QAR2(E)
        • S(a);N_GUARD,SBLOCK::R(A)
        • S(a);N_GUARD::QAR2(E),XS(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAB(E)
    • Vars
      • K(b);S_FLIGHT,XR(A)::QAR(E)+S(D)
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