MESON Chess Problem Database

Problem Display
PID: 90183 (6n1/b7/1p3R2/3kN1N1/1Prp3K/1B6/7B/Q2r1b2 w - - 0 1)

Wielgos, Oskar

Die Schwalbe, 1981

6n1/b7/1p3R2/3kN1N1/1Prp3K/1B6/7B/Q2r1b2

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Bxc4#
    • 1...Bg2
      • 2.Bxc4#
    • 1...Bh3
      • 2.Bxc4#
    • 1...Bb8
      • 2.Qa8#
    • 1...d3+
      • 2.Bxc4#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Rd6#
      • 1...Bb8
        • 2.Qa8#
      • 1...Sxf6!
    • 1.Sef3?
      • threat
        • 2.Rd6#
      • 1...d3+
        • 2.Qd4#
      • 1...Bb8
        • 2.Qa8#
      • 1...Sxf6!
    • 1.Sxc4?
      • threat
        • 2.Se3#
        • 2.Sxb6#
        • 2.Rd6#
      • 1...Bxc4
        • 2.Rd6#
      • 1...Bb8
        • 2.Se3#
        • 2.Sxb6#
        • 2.Qa8#
      • 1...b5
        • 2.Se3#
        • 2.Sb6#
        • 2.Rd6#
      • 1...Sxf6!
    • 1.Sg4?
      • threat
        • 2.Rd6#
      • 1...Bb8
        • 2.Qa8#
      • 1...Sxf6!
    • 1.Sc6?
      • threat
        • 2.Rd6#
      • 1...d3+
        • 2.Qd4#
      • 1...Sxf6
        • 2.Se7#
      • 1...Bb8!
    • 1.Qa5+?
      • 1...b5
        • 2.Qd8#
      • 1...bxa5!
    • 1.Qa6?
      • threat
        • 2.Qb5#
        • 2.Qb7#
      • 1...d3+
        • 2.Qxc4#
      • 1...Se7
        • 2.Qb5#
      • 1...b5
        • 2.Rd6#
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qd6#
        • 2.Qe6#
      • 1...Sxf6!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Rd6#
      • 1...d3+
        • 2.Sf4#
      • 1...Sxf6
        • 2.Se7#
      • 1...Bb8
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(a);S_CUTB(b)::B(C),XR(c)
    • B(b);N_GUARD::B(C),XR(c)
    • B(g);OGATE::QAB(A)
    • P(d);CHECK,S_CUTB(b)::B(C),XR(c)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(H)
      • Vars
        • B(g);OGATE::QAB(A)
      • Refutation
        • S(h);XR(H)
    • Try
      • S(F);
      • Threat
        • R1(H)
      • Vars
        • P(d);CHECK,S_CUTR(a)::QAR1(A)
        • B(g);OGATE::QAB(A)
      • Refutation
        • S(h);XR(H)
    • Try
      • S(F);XR(c)
      • Threat
        • DUALS(3)
      • Vars
        • B(b);P_SPINB(b),XS(F)::R1(H)
      • Refutation
        • S(h);XR(H)
    • Try
      • S(F);
      • Threat
        • R1(H)
      • Vars
        • B(g);OGATE::QAB(A)
      • Refutation
        • S(h);XR(H)
    • Try
      • S(F);
      • Threat
        • R1(H)
      • Vars
        • P(d);CHECK,S_CUTR(a)::QAR1(A)
        • S(h);N_GUARD,XR(H)::S(F)
      • Refutation
        • B(g);
    • Try
      • Q(A);CHECK
      • Vars
        • P(f);OGATE,P_SPINP(f)::QAR(A)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);CHECK,S_CUTB(b)::QAB1(A),XR(c)
        • S(h);::QAR2(A)
      • Refutation
        • S(h);XR(H)
  • Actual
    • S(F);
    • Threat
      • R1(H)
    • Vars
      • P(d);CHECK::S(F)
      • S(h);N_GUARD,XR(H)::S(F)
      • B(g);OGATE::QAB(A)
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