MESON Chess Problem Database

Problem Display
PID: 92123 (n4b2/3B4/5p2/2pkPN1p/N1pr4/5K2/Q7/2rRR2n w - - 0 1)

Wielgos, Oskar

Schach, 1982

n4b2/3B4/5p2/2pkPN1p/N1pr4/5K2/Q7/2rRR2n

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc3#
    • 1...Rb1
      • 2.Sc3#
    • 1...Rcxd1
      • 2.Sc3#
    • 1...Rc3+
      • 2.Sxc3#
    • 1...Rd2
      • 2.Rxd2#
      • 2.Qxd2#
    • 1...Rd3+
      • 2.Rxd3#
    • 1...Bh6
      • 2.Se7#
    • 1...Be7
      • 2.Sxe7#
    • 1...Bg7
      • 2.Se7#
    • 1...Sb6
      • 2.Sxb6#
    • 1...Sc7
      • 2.Sb6#
  • Tries
    • 1.Re4?
      • threat
        • 2.Se3#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Bh6
        • 2.Se7#
      • 1...fxe5!
    • 1.Qb3?
      • threat
        • 2.Qb7#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rd3+
        • 2.Rxd3#
      • 1...Rb1
        • 2.Sc3#
      • 1...Sb6
        • 2.Sxb6#
      • 1...cxb3!
    • 1.Qb2?
      • threat
        • 2.Qb7#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rd3+
        • 2.Se3#
      • 1...Rb1
        • 2.Sc3#
      • 1...Sb6
        • 2.Sxb6#
      • 1...c3!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qg8#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Rd3+
        • 2.Kf4#
      • 1...Bg7
        • 2.Se7#
      • 1...Sg3
        • 2.Kxg3#
      • 1...Sc7
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::S(E)
    • R(a);N_GUARD,N_SPINR(d),XR(A)::S(E)
    • R(a);CHECK,N_GUARD::S(E),XR(a)
    • R(d);CHECK,OGATEB::R(A),XR(d)
    • B(j);N_GUARD::S(G)
    • B(j);N_GUARD::S(G),XB(j)
    • S(i);N_GUARD::S(E),XS(i)
    • S(i);N_GUARD::S(E)
  • Tries
    • Try
      • R(B);
      • Threat
        • S(G)
      • Vars
        • R(a);CHECK,N_GUARD::S(E),XR(a)
        • B(j);N_GUARD::S(G)
      • Refutation
        • P(h);XP(F)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(a);CHECK,N_GUARD::S(E),XR(a)
        • R(d);CHECK,OGATEB::R(A),XR(d)
        • R(a);N_GUARD::S(E)
        • S(i);N_GUARD::S(E),XS(i)
      • Refutation
        • P(c);N_SPINP(c),XQ(C)
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • QAB(C)
      • Vars
        • R(a);CHECK,N_GUARD::S(E),XR(a)
        • R(d);CHECK::S(G)
        • R(a);N_GUARD::S(E)
        • S(i);N_GUARD::S(E),XS(i)
      • Refutation
        • P(c);
  • Actual
    • Q(C);N_PINP(c)
    • Threat
      • QAB(C)
    • Vars
      • R(a);CHECK,N_GUARD::S(E),XR(a)
      • R(d);CHECK::QAB(C)+K(D)
      • B(j);N_GUARD::S(G)
      • S(b);::QAB(C)+K(D),XS(b)
      • S(i);N_GUARD::S(E)
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