MESON Chess Problem Database

Problem Display
PID: 261209 (b7/2pQp3/8/3NP3/Rp1pkBP1/1P6/2P1N1K1/3r1B1n w - - 0 1)

Baumann, Hannes

Neue Zurcher Zeitung, 1979

b7/2pQp3/8/3NP3/Rp1pkBP1/1P6/2P1N1K1/3r1B1n

#2

11 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qf5#
    • 1...Sf2
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...d3
      • 2.Sdc3#
      • 2.Rxb4#
    • 1...e6
      • 2.Sf6#
  • Tries
    • 1.Sxb4?
      • threat
        • 2.Qf5#
      • 1...e6
        • 2.Qh7#
      • 1...Sg3!
    • 1.Sxc7?
      • threat
        • 2.Qf5#
      • 1...e6
        • 2.Qh7#
      • 1...Sg3!
    • 1.Rxb4?
      • threat
        • 2.Sec3#
        • 2.Sdc3#
      • 1...Bxd5
        • 2.Qf5#
      • 1...Rd2
        • 2.Sc3#
      • 1...Rd3!
    • 1.Ra5?
      • threat
        • 2.Qf5#
      • 1...Sg3
        • 2.Sxg3#
      • 1...e6
        • 2.Sf6#
        • 2.Qh7#
      • 1...c5!
    • 1.Qxe7?
      • threat
        • 2.Sf6#
      • 1...Bxd5
        • 2.Qh7#
      • 1...Kxd5!
  • Keys
    • 1.c4!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Qf5#
      • 1...bxc4 ep
        • 2.Sexc3#
      • 1...dxc4 ep
        • 2.Sdxc3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...e6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(h);SBLOCK,XS(I)::QAB1(K)
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
    • P(g);N_GUARD::S(I)
  • Tries
    • Try
      • S(I);XP(c)
      • Threat
        • QAB1(K)
      • Vars
        • P(g);OGATE::QAB(K)
      • Refutation
        • S(b);
    • Try
      • S(I);XP(f)
      • Threat
        • QAB1(K)
      • Vars
        • P(g);OGATE::QAB(K)
      • Refutation
        • S(b);
    • Try
      • R(F);P_PINP(d),XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(h);SBLOCK,XS(I)::QAB1(K)
        • R(a);P_PINS(C)::S(I)
      • Refutation
        • R(a);
    • Try
      • R(F);
      • Threat
        • QAB1(K)
      • Vars
        • S(b);N_GUARD::S(C),XS(b)
      • Refutation
        • P(f);
    • Try
      • Q(K);XP(g)
      • Threat
        • S(I)
      • Vars
        • B(h);SBLOCK,XS(I)::QAB(K)
      • Refutation
        • K(e);S_FLIGHT,XS(I)
  • Actual
    • P(B);
    • Threat
      • QAB1(K)
    • Vars
      • K(e);P_PINS(I),S_FLIGHT::QAB(K)
      • P(c);EP,N_GUARD,P_SPINP(d),XP(B)::S(C),XP(c)
      • P(d);EP,N_GUARD,P_SPINP(c),XP(B)::S(I),XP(d)
      • S(b);N_GUARD::S(C),XS(b)
      • P(g);OGATE::QAB(K)
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