MESON Chess Problem Database

Problem Display
PID: 244831 (8/8/2R2K2/6p1/3k2N1/5Q2/1r6/8 w - - 0 1)

Froberg, Johan Hilding Laurentius

Revista Romana de Sah, 1972

8/8/2R2K2/6p1/3k2N1/5Q2/1r6/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qd5#
        • 2.Qe3#
      • 1...Rb3
        • 2.Qd5#
      • 1...Rb5
        • 2.Qe3#
      • 1...Re2+!
    • 1.Sf2?
      • threat
        • 2.Qe4#
        • 2.Qd3#
      • 1...Rd2
        • 2.Qe4#
      • 1...Re2
        • 2.Qd3#
      • 1...Rb3
        • 2.Qe4#
      • 1...Rxf2!
    • 1.Se3?
      • threat
        • 2.Sf5#
      • 1...Rb5
        • 2.Sc2#
      • 1...Kd3!
    • 1.Qd1+?
      • 1...Ke4
        • 2.Rc4#
      • 1...Rd2!
    • 1.Qc3+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Ke4!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Qe3#
      • 1...Kd5
        • 2.Qc4#
      • 1...gxf4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Rc4#
        • 2.Qd3#
      • 1...Rc2
        • 2.Qd3#
      • 1...Rd2
        • 2.Rc4#
      • 1...Rf2
        • 2.Rc4#
      • 1...Rb3
        • 2.Rc4#
      • 1...Rb4
        • 2.Qd3#
      • 1...Rb6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAR1(A)
        • R(a);::QAB1(A)
      • Refutation
        • R(a);CHECK
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAR1(A)
      • Refutation
        • R(a);P_PINQ(A),XS(B)
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • R(a);N_GUARD::S(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(C)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);::QAR1(A)
      • R(a);::R1(C)
      • R(a);P_PINQ(A)::R1(C)
      • R(a);P_PINR(C)::QAR1(A)
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