MESON Chess Problem Database

Problem Display
PID: 106207 (1nK5/Q1p4p/3R1R2/1rp1kB2/7r/2Nn2P1/8/B7 w - - 0 1)

Seckar, Milos

Praca, 1950

1nK5/Q1p4p/3R1R2/1rp1kB2/7r/2Nn2P1/8/B7

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rde6#
    • 1...Sb4
      • 2.Se4#
    • 1...Sf4
      • 2.Sxb5#
    • 1...c4
      • 2.Rde6#
    • 1...c6
      • 2.Qe7#
  • Tries
    • 1.Sxb5+?
      • 1...Sb2
        • 2.Qxc5#
      • 1...Rd4!
    • 1.Rf7?
      • threat
        • 2.Rd5#
      • 1...Kxd6
        • 2.Qxc7#
      • 1...Rd4
        • 2.Re6#
      • 1...Sb4
        • 2.Se4#
      • 1...Sf4
        • 2.Sxb5#
      • 1...c4
        • 2.Re6#
      • 1...c6
        • 2.Qe7#
      • 1...cxd6!
  • Keys
    • 1.Rf8!
      • threat
        • 2.Rd5#
      • 1...Kxd6
        • 2.Qxc7#
      • 1...cxd6
        • 2.Qg7#
      • 1...Rd4
        • 2.Re6#
      • 1...Sb4
        • 2.Se4#
      • 1...Sf4
        • 2.Sxb5#
      • 1...c4
        • 2.Re6#
      • 1...c6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::R1(E)
    • S(a);N_GUARD,S_CUTR(c)::B(A)+S(B)
    • S(a);N_GUARD,S_CUTR(b)::B(A)+S(B),XR(c)
    • P(d);::R1(E)
    • P(f);OGATE::QAR2(G)
  • Tries
    • Try
      • S(B);CHECK,XR(c)
      • Vars
        • S(a);P_SPINS(a)::QAR2(G),XP(d)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(F);
      • Threat
        • R1(E)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(E)::QAB1(G),XP(f)
        • R(b);SBLOCK::R1(E)
        • S(a);N_GUARD,S_CUTR(c)::B(A)+S(B)
        • S(a);N_GUARD,S_CUTR(b)::B(A)+S(B),XR(c)
        • P(d);::R1(E)
        • P(f);OGATE::QAR2(G)
      • Refutation
        • P(f);XR(E)
  • Actual
    • R(F);
    • Threat
      • R1(E)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(E)::QAB1(G),XP(f)
      • P(f);OGATE,SBLOCK,XR(E)::QAB(G)
      • R(b);SBLOCK::R1(E)
      • S(a);N_GUARD,S_CUTR(c)::B(A)+S(B)
      • S(a);N_GUARD,S_CUTR(b)::B(A)+S(B),XR(c)
      • P(d);::R1(E)
      • P(f);OGATE::QAR2(G)
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