MESON Chess Problem Database

Problem Display
PID: 174740 (8/4BN2/8/4P3/3kPp2/1K1Pp3/1n1R4/6Q1 w - - 0 1)

Zajic, Helmut

Die Schwalbe, 1972

8/4BN2/8/4P3/3kPp2/1K1Pp3/1n1R4/6Q1

#2

8 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Qg7#
      • 1...Sxd3!
    • 1.Qa1?
      • threat
        • 2.Qxb2#
        • 2.Qa7#
      • 1...e2
        • 2.Qg1#
        • 2.Qa7#
      • 1...exd2!
    • 1.Qc1?
      • threat
        • 2.Bc5#
        • 2.Qxb2#
        • 2.Qc3#
        • 2.Qc5#
      • 1...Sxd3
        • 2.Qc4#
      • 1...e2
        • 2.Bc5#
        • 2.Qg1#
        • 2.Qc5#
      • 1...Sd1
        • 2.Bc5#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sc4
        • 2.Qc3#
        • 2.Qxc4#
      • 1...exd2!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf3#
      • 1...Kxe5
        • 2.d4#
      • 1...Sxd3
        • 2.Qa1#
      • 1...f3
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • K(c);N_SPINP(b),OGATEB,S_FLIGHT,XP(F)::QAB(A)
      • Refutation
        • S(a);P_SPINS(a),XP(D)
    • Try
      • Q(A);N_PINP(b),P_PINS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(A);N_PINP(b)
      • Threat
        • DUALS(4)
      • Vars
        • S(a);N_GUARD,P_SPINS(a),XP(D)::QAR1(A)
        • S(a);N_GUARD::QAR1(A)
      • Refutation
        • P(b);XR(B)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(c);N_SPINP(b),OGATE,S_FLIGHT,XP(F)::P(D)
      • S(a);OGATEB,P_SPINS(a),XP(D)::QAB(A)
      • P(d);::S(H),XP(d)
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