MESON Chess Problem Database

Problem Display
PID: 278206 (8/rpp2pK1/rQ1p4/2P1k1N1/1p6/2PRBRPp/n3p2q/b6n w - - 0 1)

Schneider, Michael

Stella Polaris, 1972

8/rpp2pK1/rQ1p4/2P1k1N1/1p6/2PRBRPp/n3p2q/b6n

#2

9 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qxc5#
    • 1...d5
      • 2.Bd4#
    • 1...f5
      • 2.Bf4#
  • Tries
    • 1.Qxc7?
      • threat
        • 2.Qe7#
      • 1...b6
        • 2.Qxd6#
      • 1...b5!
    • 1.c4?
      • threat
        • 2.Rd5#
      • 1...Bd4
        • 2.Bxd4#
      • 1...Sc3
        • 2.Bd4#
      • 1...d5
        • 2.Rxd5#
      • 1...c6!
  • Keys
    • 1.g4!
      • threat
        • 2.Rf5#
      • 1...Qf2
        • 2.Bf4#
      • 1...Qf4
        • 2.Bxf4#
      • 1...Sg3
        • 2.Bf4#
      • 1...f5
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(j);OGATE,XP(F)::QAR2(H),XP(j)
    • P(j);SBLOCK::B(C)
    • P(n);SBLOCK::B(C)
  • Tries
    • Try
      • Q(H);P_PINP(j),XP(m)
      • Threat
        • QAR2(H)
      • Vars
        • P(l);S_CUTR(i)::QAB1(H),XP(j)
      • Refutation
        • P(l);
    • Try
      • P(A);
      • Threat
        • R1(B)
      • Vars
        • B(a);N_GUARD::B(C),XB(a)
        • S(c);S_CUTB(a)::B(C)
        • P(j);::R1(B),XP(j)
      • Refutation
        • P(m);
  • Actual
    • P(E);
    • Threat
      • R1(D)
    • Vars
      • Q(e);N_GUARD::B(C)
      • Q(e);N_GUARD::B(C),XQ(e)
      • S(b);S_CUTQ(e)::B(C)
      • P(n);::R1(D),XP(n)
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