MESON Chess Problem Database

Problem Display
PID: 242582 (8/1B6/7p/1P3K1Q/1pNk1P2/8/1PR5/r1n3n1 w - - 0 1)

Myrhaug, Alf

Tidskrift for Schack, 1979

8/1B6/7p/1P3K1Q/1pNk1P2/8/1PR5/r1n3n1

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qd1#
    • 1...Kc5
      • 2.Ke4#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd1#
      • 1...Ra6+!
    • 1.Kf6?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd1#
      • 1...Ra6+!
    • 1.Kg6?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd1#
      • 1...Ra6+!
    • 1.Qd1+?
      • 1...Kc5
        • 2.Qd5#
      • 1...Sd3!
    • 1.Qf3?
      • threat
        • 2.Qd5#
        • 2.Qe3#
      • 1...Kc5
        • 2.Qd5#
      • 1...Ra3
        • 2.Qd5#
      • 1...Sxf3!
    • 1.Qg6?
      • threat
        • 2.Qd6#
      • 1...Kd3
        • 2.Ke5#
      • 1...Kc5
        • 2.Qb6#
      • 1...Ra6!
    • 1.Qe8?
      • threat
        • 2.Qe3#
      • 1...Kd3
        • 2.Qe4#
      • 1...Kc5
        • 2.Qe5#
      • 1...Ra3!
    • 1.Qh1?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qe4#
      • 1...Kc5
        • 2.Qd5#
      • 1...Sf3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Rd2#
      • 1...Kc5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT::QAR2(G)
    • K(e);S_FLIGHT::QAR(G)+K(F)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • QAR1(G)
      • Vars
        • K(e);P-FLIGHT::QAR2(G)
      • Refutation
        • R(a);CHECK
    • Try
      • K(F);P-FLIGHT
      • Threat
        • QAR1(G)
      • Vars
        • K(e);P-FLIGHT::QAR2(G)
      • Refutation
        • R(a);CHECK
    • Try
      • K(F);S_FLIGHT
      • Threat
        • QAR1(G)
      • Vars
        • K(e);P-FLIGHT::QAR2(G)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::QAR1(G)
        • R(a);::QAR1(G)
      • Refutation
        • S(c);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • K(e);P-FLIGHT::QAB(G)+K(F)
        • K(e);S_FLIGHT::QAB1(G)
      • Refutation
        • R(a);
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • K(e);P-FLIGHT::QAB1(G)
        • K(e);S_FLIGHT::QAR2(G)
      • Refutation
        • R(a);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(e);P-FLIGHT::QAB1(G)
        • K(e);S_FLIGHT::QAR1(G)
      • Refutation
        • S(c);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • K(e);P-FLIGHT::R1(B)
      • K(e);S_FLIGHT::QAR1(G)
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