MESON Chess Problem Database

Problem Display
PID: 140853 (B1n5/Br1p4/pp6/P3NP1n/RK2k3/PP2N3/5R2/Q7 w - - 0 1)

Stolev, Nikola

1/2 Place, Liga Problemista, 1987/2

B1n5/Br1p4/pp6/P3NP1n/RK2k3/PP2N3/5R2/Q7

#2

12 + 7

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...bxa5+
      • 2.Kxa5#
    • 1...b5
      • 2.Qd4#
  • Tries
    • 1.Kc3+?
      • 1...Kxe3
        • 2.Sg4#
        • 2.Qe1#
      • 1...Kxe5!
    • 1.Sc2?
      • threat
        • 2.Qd4#
      • 1...bxa5+
        • 2.Kc5#
      • 1...Kd5
        • 2.Qd4#
      • 1...Sf4!
    • 1.Rd2?
      • threat
        • 2.Qd4#
      • 1...bxa5+
        • 2.Kxa5#
      • 1...Kxe3
        • 2.Qd4#
      • 1...Kf4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qd4#
      • 1...bxa5+
        • 2.Kc3#
      • 1...Kd3
        • 2.Qd4#
      • 1...Kxe3
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe5#

This is a version of 15719

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(d);CHECK,XP(H)::R(F)+K(G),XP(d)
    • P(d);::QAR1(A)
  • Tries
    • Try
      • K(G);CHECK,S_FLIGHT
      • Refutation
        • K(a);N_SPINR(e),P-FLIGHT,XS(I)
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • P(d);CHECK,XP(H)::R(F)+K(G)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • R(B);
      • Threat
        • QAR1(A)
      • Vars
        • P(d);CHECK,XP(H)::R(F)+K(G),XP(d)
        • K(a);N_SPINR(e),P-FLIGHT,P_SPINP(d),XS(E)::QAB1(A)
      • Refutation
        • K(a);N_SPINR(e),P-FLIGHT
  • Actual
    • S(I);
    • Threat
      • QAR1(A)
    • Vars
      • P(d);CHECK,XP(H)::R(F)+K(G)
      • K(a);N_SPINR(e),S_FLIGHT::QAR1(A)
      • K(a);N_SPINR(e),P-FLIGHT,P_SPINP(d),XS(E)::QAB1(A)
      • K(a);N_SPINR(e),P-FLIGHT::QAB1(A)
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