MESON Chess Problem Database

Problem Display
PID: 271184 (6Q1/2p5/KpPk1P2/p7/2nNpp2/r7/q3N2B/2RR1b2 w - - 0 1)

Storm, Fredrik

Schackvarlden, 1940

6Q1/2p5/KpPk1P2/p7/2nNpp2/r7/q3N2B/2RR1b2

#2

9 + 10

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qe6#
    • 1...Sb2
      • 2.Bxf4#
    • 1...Sd2
      • 2.Bxf4#
    • 1...Se3
      • 2.Bxf4#
    • 1...Se5
      • 2.Sb5#
      • 2.Sf5#
  • Tries
    • 1.Bxf4+?
      • 1...Se5
        • 2.Sb5#
        • 2.Sf5#
        • 2.Qd8#
      • 1...Kc5!
    • 1.Rxc4?
      • threat
        • 2.Bxf4#
        • 2.Qe6#
      • 1...Ke5
        • 2.Qe6#
      • 1...Qd2
        • 2.Qe6#
      • 1...Rf3
        • 2.Qe6#
      • 1...Rg3
        • 2.Qe6#
      • 1...Bh3
        • 2.Bxf4#
      • 1...Qxc4+!
    • 1.Qd8+?
      • 1...Ke5
        • 2.Bxf4#
      • 1...Kc5!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Qd5#
      • 1...Sb2+
        • 2.Sd3#
      • 1...Sd2+
        • 2.Sd3#
      • 1...Se3+
        • 2.Sfe2#
      • 1...Se5+
        • 2.Sb5#
      • 1...Kc5
        • 2.Qf8#
      • 1...Ke5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(i);N_GUARD,S_FLIGHT::QAR1(I)
    • S(d);N_GUARD,P_PINS(C)::B(D),XP(f)
  • Tries
    • Try
      • B(D);CHECK,XP(f)
      • Refutation
        • K(i);P_SPINS(d),S_FLIGHT
    • Try
      • R(A);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • K(i);S_FLIGHT::QAR1(I)
        • Q(b);::QAR1(I)
        • R(c);::QAR1(I)
        • R(c);N_SPINP(f)::QAR1(I)
        • B(a);::B(D),XP(f)
      • Refutation
        • Q(b);CHECK,XR(A)
    • Try
      • Q(I);CHECK
      • Vars
        • K(i);N_GUARD,S_FLIGHT::B(D),XP(f)
      • Refutation
        • K(i);N_SPINP(f),P_SPINS(d),S_FLIGHT
  • Actual
    • S(C);XP(f)
    • Threat
      • QAR1(I)
    • Vars
      • S(d);CHECK,N_GUARD,S_CUTQ(b)::B(D)+S(C)
      • S(d);CHECK,N_GUARD,S_CUTR(c)::B(D)+S(C)
      • S(d);CHECK,SBLOCK::R(B)+S(E),DCHECK
      • K(i);N_GUARD,P_SPINS(d),S_FLIGHT::QAB(I)
      • K(i);N_GUARD,S_FLIGHT::QAR1(I)
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