MESON Chess Problem Database

Problem Display
PID: 110208 (4r3/B1p2p2/1rN5/5R2/1R2P2b/4kp2/1P2nn2/1B2QK2 w - - 0 1)

Labai, Zoltan

Istokovics MT, 1987

4r3/B1p2p2/1rN5/5R2/1R2P2b/4kp2/1P2nn2/1B2QK2

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sh1
      • 2.Rb3#
    • 1...Sh3
      • 2.Rb3#
    • 1...Sg4
      • 2.Rb3#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Qd2#
      • 1...Rxb2
        • 2.Rb4#
      • 1...Sxe4
        • 2.Rd3#
      • 1...Sd3!
    • 1.Rxb6?
      • threat
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rbb5#
        • 2.Ra6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Rxe4
        • 2.Rb3#
      • 1...Sxe4
        • 2.Rb3#
      • 1...cxb6
        • 2.Bxb6#
      • 1...Re5
        • 2.Rb3#
      • 1...Ra8
        • 2.Rb3#
      • 1...Rb8
        • 2.Rb3#
        • 2.Rb7#
        • 2.Rxb8#
      • 1...Rd8
        • 2.Rb3#
      • 1...Bf6
        • 2.Rb3#
      • 1...Be7
        • 2.Rb3#
      • 1...Sd3!
    • 1.Qc3+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sxc3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rxf3#
      • 1...Sd3
        • 2.Sc2#
      • 1...Rf6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::R(E)
  • Tries
    • Try
      • R(E);N_PINR(f)
      • Threat
        • QAB1(B)
      • Vars
        • R(f);OGATEB,XP(D)::B(I)+R(E)
        • S(b);N_GUARD,SBLOCK,XP(F)::R1(E)
      • Refutation
        • S(b);
    • Try
      • R(E);XR(f)
      • Threat
        • DUALS(6)
      • Vars
        • R(i);XP(F)::B(I)+R(E),DCHECK
        • S(b);XP(F)::B(I)+R(E),DCHECK
        • P(g);OGATE,P_SPINP(g),XR(E)::B(I),XP(g)
        • R(i);::B(I)+R(E),DCHECK
        • B(e);::B(I)+R(E),DCHECK
      • Refutation
        • S(b);
    • Try
      • Q(B);CHECK,N_PINS(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(B),XS(b)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(H);N_PINR(f)
    • Threat
      • R1(G),XP(d)
    • Vars
      • S(b);SBLOCK::S(H)
      • R(f);::B(I)+S(H)
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