MESON Chess Problem Database

Problem Display
PID: 99198 (5KB1/2p2n2/2pk4/2p1N2R/b1n3P1/8/Q3R2B/8 w - - 0 1)

Jurka, Eriks

Magyar Sakkelet, 1956

5KB1/2p2n2/2pk4/2p1N2R/b1n3P1/8/Q3R2B/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sf3#
    • 1...Sd2
      • 2.Rxd2#
    • 1...Sa3
      • 2.Rd2#
    • 1...Sa5
      • 2.Rd2#
    • 1...Scxe5
      • 2.Rd2#
    • 1...Sh6
      • 2.Rxh6#
  • Tries
    • 1.Bxf7?
      • threat
        • 2.Rh6#
      • 1...Sxe5
        • 2.Rd2#
        • 2.Qe6#
        • 2.Qd2#
      • 1...Bc2!
    • 1.Rd2+?
      • 1...Ke6
        • 2.Rh6#
      • 1...Sxd2!
    • 1.Rh6+?
      • 1...Kd5
        • 2.Qxc4#
      • 1...Sxh6!
    • 1.Qd2+?
      • 1...Ke6
        • 2.Rh6#
      • 1...Sxd2!
  • Keys
    • 1.Ke8!
      • threat
        • 2.Sxc4#
        • 2.Sxf7#
      • 1...Kd5
        • 2.Sf3#
      • 1...Ke6
        • 2.Sd7#
      • 1...Scxe5
        • 2.Rd2#
      • 1...Sfxe5
        • 2.Rh6#
      • 1...Sb2
        • 2.Sc4#
        • 2.Sxf7#
      • 1...Sd2
        • 2.Sc4#
        • 2.Sxf7#
        • 2.Rxd2#
      • 1...Sa3
        • 2.Sc4#
        • 2.Sxf7#
        • 2.Rd2#
      • 1...Se3
        • 2.Sxf7#
      • 1...Sa5
        • 2.Sc4#
        • 2.Sxf7#
        • 2.Rd2#
      • 1...Sb6
        • 2.Sc4#
        • 2.Sxf7#
      • 1...Sg5
        • 2.Sxc4#
      • 1...Sh6
        • 2.Sxc4#
        • 2.Sf7#
        • 2.Rxh6#
      • 1...Sd8
        • 2.Sxc4#
        • 2.Sf7#
      • 1...Sh8
        • 2.Sxc4#
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • K(e);P-FLIGHT,P_SPINS(b)::R(F)+S(E)
    • S(b);N_GUARD::R(B),XS(b)
    • S(b);N_GUARD::R(B)
    • S(b);N_GUARD,P_SPINS(b),XS(E)::R(B)
    • S(g);N_GUARD::R(F),XS(g)
  • Tries
    • Try
      • B(H);XS(g)
      • Threat
        • R(F)
      • Refutation
        • B(a);
    • Try
      • R(B);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(b)::R(F)
      • Refutation
        • S(b);XR(B)
    • Try
      • R(F);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • S(g);XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(g)::R(F)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • K(G);P-FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • K(e);P-FLIGHT,P_SPINS(b)::R(F)+S(E)
      • K(e);P-FLIGHT,P_SPINS(b)::R(B)+S(E)
      • S(b);N_GUARD,P_SPINS(b),XS(E)::R(B)
      • S(g);N_GUARD,P_SPINS(g),XS(E)::R(F)
      • S(b);::B(C)+S(E),DCHECK,XS(g)
      • S(g);::B(C)+S(E),DCHECK,XS(b)
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