MESON Chess Problem Database

Problem Display
PID: 246318 (4QK1k/4RR2/8/8/2n5/7r/4p3/8 w - - 0 1)

Bartolovic, Hrvoje

Europe Echecs, 1967

4QK1k/4RR2/8/8/2n5/7r/4p3/8

#2

4 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Rh7#
    • 1...Rb3
      • 2.Rh7#
    • 1...Rc3
      • 2.Rh7#
    • 1...Rd3
      • 2.Rh7#
    • 1...Re3
      • 2.Rh7#
    • 1...Rg3
      • 2.Rh7#
    • 1...Rh7
      • 2.Rxh7#
  • Tries
    • 1.Re5?
      • threat
        • 2.Ke7#
      • 1...Rg3
        • 2.Rh5#
      • 1...Sd6!
    • 1.Re6?
      • threat
        • 2.Ke7#
      • 1...Rg3
        • 2.Rh6#
      • 1...Sd6!
    • 1.Rg7?
      • threat
        • 2.Kf7#
        • 2.Rg8#
      • 1...Rg3
        • 2.Kf7#
        • 2.Rh7#
        • 2.Qh5#
      • 1...Se5
        • 2.Rg8#
      • 1...Sd6
        • 2.Rg8#
      • 1...Rf3+!
    • 1.Qc6?
      • threat
        • 2.Qf6#
      • 1...Rf3
        • 2.Qh6#
      • 1...Rg3
        • 2.Rh7#
        • 2.Qh6#
      • 1...Rh6
        • 2.Qxh6#
      • 1...Rh7
        • 2.Rxh7#
      • 1...Sd6!
  • Keys
    • 1.Re4!
      • threat
        • 2.Ke7#
      • 1...Rg3
        • 2.Rh4#
      • 1...Sd6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::R1(B)
    • R(b);N_GUARD::R1(B),XR(b)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAR(C)+K(D)
      • Vars
        • R(b);N_GUARD::R(A)
      • Refutation
        • S(c);
    • Try
      • R(A);
      • Threat
        • QAR(C)+K(D)
      • Vars
        • R(b);N_GUARD::R(A)
      • Refutation
        • S(c);
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::R1(B)
      • Refutation
        • R(b);CHECK
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(b);N_GUARD,P_PINR(B)::QAR2(C)
        • R(b);N_GUARD::QAR2(C),XR(b)
        • R(b);N_GUARD::R1(B),XR(b)
      • Refutation
        • S(c);
  • Actual
    • R(A);
    • Threat
      • QAR(C)+K(D)
    • Vars
      • R(b);N_GUARD::R(A)
      • S(c);N_GUARD::QAB(C)
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