MESON Chess Problem Database

Problem Display
PID: 92149 (B2R2Qq/rn1p2p1/pP1k2N1/5P2/KP3n2/5N2/2R5/7b w - - 0 1)

Wielgos, Oskar

Schach-Aktiv, 1986

B2R2Qq/rn1p2p1/pP1k2N1/5P2/KP3n2/5N2/2R5/7b

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qe6#
    • 1...Sg2
      • 2.Qe6#
    • 1...Sd3
      • 2.Qe6#
    • 1...Sh3
      • 2.Qe6#
    • 1...Sd5
      • 2.Qe6#
    • 1...Sh5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sxg6
      • 2.Qe6#
    • 1...Sc5+
      • 2.bxc5#
  • Tries
    • 1.Rd2+?
      • 1...Sd3
        • 2.Qe6#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qe6#
      • 1...Kc6!
    • 1.Rc7?
      • threat
        • 2.Rdxd7#
      • 1...Sc5+
        • 2.bxc5#
      • 1...Sxd8!
    • 1.Qe8?
      • threat
        • 2.Rxd7#
        • 2.Qxd7#
        • 2.Qe5#
      • 1...Sc5+
        • 2.bxc5#
      • 1...Kd5
        • 2.Rxd7#
        • 2.Qe5#
      • 1...Sxg6
        • 2.Rxd7#
        • 2.Qxd7#
        • 2.Qe6#
      • 1...Sxd8
        • 2.Qe5#
        • 2.Qe7#
      • 1...Sd3
        • 2.Rxd7#
        • 2.Qxd7#
        • 2.Qe6#
      • 1...Se6
        • 2.Rxd7#
        • 2.Qxd7#
        • 2.Qxe6#
      • 1...Sa5
        • 2.Qe5#
        • 2.Qe7#
      • 1...Qxe8!
  • Keys
    • 1.Sfe5!
      • threat
        • 2.Rxd7#
      • 1...Bc6+
        • 2.Rxc6#
      • 1...Sc5+
        • 2.bxc5#
      • 1...Sxg6
        • 2.Qe6#
      • 1...Sxd8
        • 2.Sc4#
      • 1...Sa5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(b);N_GUARD::QAR1(J)
    • S(b);N_GUARD::QAR1(J),XS(b)
    • S(b);N_GUARD,XS(G)::QAR1(J)
    • S(f);CHECK,OGATE::P(D),XS(f)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • S(b);P_SPINS(b)::QAR1(J)
      • Refutation
        • K(d);N_SPINP(g),P-FLIGHT,P_SPINS(f)
    • Try
      • R(A);
      • Threat
        • R1(I),XP(g)
      • Vars
        • S(f);CHECK,OGATE::P(D),XS(f)
      • Refutation
        • S(f);N_SPINP(g),XR(I)
    • Try
      • Q(J);
      • Threat
        • DUALS(3)
      • Vars
        • S(f);CHECK,OGATE::P(D),XS(f)
      • Refutation
        • Q(i);XQ(J)
  • Actual
    • S(B);
    • Threat
      • R1(I),XP(g)
    • Vars
      • B(a);CHECK,N_GUARD::R1(A),XB(a)
      • S(f);CHECK,OGATE::P(D),XS(f)
      • S(b);N_GUARD,XS(G)::QAR1(J)
      • S(f);N_SPINP(g),XR(I)::S(B)
      • S(f);::S(B)
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