MESON Chess Problem Database

Problem Display
PID: 95213 (8/2Kn4/1B4N1/3k1b2/2pNR3/3n2p1/8/3Q4 w - - 0 1)

Kotrc, Jan

Pravo lidu, 1910

8/2Kn4/1B4N1/3k1b2/2pNR3/3n2p1/8/3Q4

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qf3#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Sc3#
      • 1...Sxb6
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...c3
        • 2.Sxc3#
        • 2.Qxd3#
      • 1...Bxe4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Sc3#
      • 1...Bxe4
        • 2.Sef4#
      • 1...Sxb6
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...c3
        • 2.Sxc3#
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
  • Tries
    • Try
      • S(B);P_PINS(a)
      • Threat
        • S(B)
      • Vars
        • K(d);N_SPINS(a),S_FLIGHT,XR(C)::S(B)
        • S(f);N_GUARD,XB(D)::R1(C)
        • S(f);N_GUARD::R1(C),XS(f)
      • Refutation
        • B(e);XR(C)
  • Actual
    • S(B);P_PINS(a)
    • Threat
      • S(B)
    • Vars
      • K(d);N_SPINS(a),S_FLIGHT,XR(C)::S(B)
      • B(e);SBLOCK,XR(C)::S(B)
      • S(f);N_GUARD,XB(D)::R1(C)
      • S(f);N_GUARD::R1(C),XS(f)
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