MESON Chess Problem Database

Problem Display
PID: 22290 (8/8/8/8/3Q4/R7/np1K4/1k6 w - - 0 1)

Ekstrom, Sven Johan Adrian

Schackvarlden, 1944

8/8/8/8/3Q4/R7/np1K4/1k6

#2

3 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
3310 2345 Chess Problems 1997
2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Qd3#
    • 1...Sb4
      • 2.Qg1#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qxb2#
      • 1...Ka1
        • 2.Qxb2#
      • 1...Sc3!
    • 1.Qa4?
      • 1...Sc1
        • 2.Qc2#
      • 1...Sc3
        • 2.Qc2#
      • 1...Sb4
        • 2.Qd1#
      • 1...Ka1!
    • 1.Qd5?
      • threat
        • 2.Qxa2#
      • 1...Ka1
        • 2.Qxa2#
      • 1...Sc3
        • 2.Qd3#
      • 1...Sb4
        • 2.Qh1#
      • 1...Sc1!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qxa2#
      • 1...Ka1
        • 2.Qxa2#
      • 1...Sc1
        • 2.Qc2#
      • 1...Sc3
        • 2.Qd3#
      • 1...Sb4
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);::QAB(C)
    • S(b);N_GUARD::QAR(C)
  • Tries
    • Try
      • R(B);P_PINP(c)
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • K(a);P-FLIGHT::QAB1(C),XP(c)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Vars
        • S(b);::QAB1(C)
        • S(b);N_GUARD::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(b)
    • Try
      • Q(C);
      • Threat
        • QAB1(C),XS(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR1(C),XS(b)
        • S(b);::QAB(C)
        • S(b);N_GUARD::QAR(C)
      • Refutation
        • S(b);
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XS(b)
    • Vars
      • K(a);P-FLIGHT,P_SPINS(b)::QAR1(C),XS(b)
      • S(b);::QAB1(C)
      • S(b);::QAB(C)
      • S(b);N_GUARD::QAR(C)
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