MESON Chess Problem Database

Problem Display
PID: 174750 (3n4/3K4/3B2B1/5N2/P1kp4/3p2R1/3P4/b2Q2n1 w - - 0 1)

Zajic, Helmut

Schach-Echo, 1963

3n4/3K4/3B2B1/5N2/P1kp4/3p2R1/3P4/b2Q2n1

#2

8 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Bf7#
    • 1...Sb7
      • 2.Bf7#
    • 1...Sf7
      • 2.Bxf7#
  • Tries
    • 1.Bf7+?
      • 1...Se6
        • 2.Bxe6#
      • 1...Sxf7!
    • 1.Rxd3?
      • threat
        • 2.Qb3#
      • 1...Kxd3
        • 2.Se3#
      • 1...Kd5
        • 2.Se3#
      • 1...Bc3!
    • 1.Qc2+?
      • 1...Kd5
        • 2.Se7#
      • 1...Bc3
        • 2.Qa2#
      • 1...dxc2!
    • 1.Qxa1?
      • threat
        • 2.Qa2#
      • 1...Kd5
        • 2.Qxd4#
      • 1...Kb3!
    • 1.Qb1?
      • threat
        • 2.Qa2#
        • 2.Qb5#
      • 1...Bb2
        • 2.Qa2#
      • 1...Kd5!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::B(G)
    • S(f);N_GUARD::B(G),XS(f)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::B(G),XS(f)
      • Refutation
        • S(f);XB(G)
    • Try
      • R(C);XP(c)
      • Threat
        • QAB1(A)
      • Vars
        • K(d);S_FLIGHT,XR(C)::B(G)+S(E)
        • K(d);P_SPINP(e),S_FLIGHT::S(E)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT::S(E)
        • B(a);P_SPINB(a)::QAB(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);XB(a)
      • Threat
        • QAB(A)
      • Vars
        • K(d);S_FLIGHT::QAR1(A),XP(e)
      • Refutation
        • K(d);P_SPINP(c),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB(A)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(C);P_PINP(e)
    • Threat
      • S(E)
    • Vars
      • K(d);N_SPINP(e),S_FLIGHT::QAB(A)
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