MESON Chess Problem Database

Problem Display
PID: 227041 (3K4/2p1Qp2/bnB4p/2p1p1N1/R1pk4/5p2/1P5n/2B1N1b1 w - - 0 1)

Schonholzer, Andreas

Schweizerische Schachzeitung, 1985

3K4/2p1Qp2/bnB4p/2p1p1N1/R1pk4/5p2/1P5n/2B1N1b1

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Sgxf3#
    • 1...Sg4
      • 2.Sgxf3#
    • 1...Sxa4
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...Sa8
      • 2.Qd7#
    • 1...e4
      • 2.Qf6#
      • 2.Qxe4#
    • 1...f5
      • 2.Se6#
    • 1...f6
      • 2.Se6#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qxc5#
      • 1...Sxa4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sd5!
    • 1.Sxf7?
      • threat
        • 2.Qxe5#
      • 1...Sd7
        • 2.Qxd7#
      • 1...e4
        • 2.Qf6#
        • 2.Qxe4#
        • 2.Qe5#
      • 1...Sg4!
    • 1.Ra5?
      • threat
        • 2.Qxc5#
      • 1...Sa4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bb5!
    • 1.Qd6+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...cxd6!
    • 1.Qd7+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sxd7!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qxe5#
      • 1...exf4
        • 2.Qe4#
      • 1...Sg4
        • 2.Sgxf3#
      • 1...Sd7
        • 2.Qxd7#
      • 1...e4
        • 2.Qf6#
        • 2.Qxe4#
        • 2.Qe5#
      • 1...f6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::S(E),XP(c)
    • S(i);N_GUARD,N_SPINP(d),XR(D)::QAR(G)
    • S(i);N_GUARD::QAR(G),XS(i)
    • S(i);N_GUARD::QAR(G)
    • P(l);N_GUARD::S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(G),XP(f)
      • Vars
        • S(i);N_GUARD,N_SPINP(d),XR(D)::QAR(G)
        • S(i);N_GUARD::QAR(G),XS(i)
      • Refutation
        • S(i);
    • Try
      • S(E);XP(l)
      • Threat
        • QAB1(G),XP(g)
      • Vars
        • S(i);N_GUARD::QAR(G),XS(i)
      • Refutation
        • S(b);
    • Try
      • R(D);N_PINP(d)
      • Threat
        • QAB1(G),XP(f)
      • Vars
        • S(i);N_GUARD::QAR(G)
        • S(i);N_GUARD::QAR(G),XS(i)
      • Refutation
        • B(h);
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR1(G),XS(i)
      • Refutation
        • P(k);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR1(G),XS(i)
      • Refutation
        • S(i);XQ(G)
  • Actual
    • B(A);
    • Threat
      • QAB1(G),XP(g)
    • Vars
      • P(g);OGATE,XB(A)::QAR1(G)
      • S(b);N_GUARD::S(E),XP(c)
      • S(i);N_GUARD::QAR(G),XS(i)
      • P(l);N_GUARD::S(E)
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