MESON Chess Problem Database

Problem Display
PID: 92099 (8/1N6/p1qN4/4r3/1k2P3/1P1B1p2/3P4/QR2BK2 w - - 0 1)

Wielgos, Oskar

Deutsche Schachblatter, 1979

8/1N6/p1qN4/4r3/1k2P3/1P1B1p2/3P4/QR2BK2

#2

10 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qxa4#
      • 2.bxa4#
    • 1...Qxe4
      • 2.Qa4#
    • 1...Qd5
      • 2.Qa4#
    • 1...Qc1
      • 2.Qa4#
    • 1...Qc2
      • 2.Qa4#
    • 1...Qc3
      • 2.Qa4#
      • 2.dxc3#
    • 1...Qc4
      • 2.Qa4#
      • 2.bxc4#
    • 1...Qc5
      • 2.Qa4#
    • 1...Qb6
      • 2.Qa4#
    • 1...Qxd6
      • 2.Qa4#
    • 1...Qc7
      • 2.Qa4#
    • 1...Qc8
      • 2.Qa4#
    • 1...Rxe4
      • 2.Qa5#
    • 1...Ra5
      • 2.Qxa5#
    • 1...Rb5
      • 2.Qa4#
    • 1...Re6
      • 2.Qa5#
    • 1...Re7
      • 2.Qa5#
    • 1...Re8
      • 2.Qa5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qa3#
        • 2.Qa4#
        • 2.Qa5#
      • 1...Qxb7
        • 2.Qc3#
        • 2.Qa3#
      • 1...Rxb5
        • 2.Qa4#
      • 1...axb5
        • 2.Qa5#
      • 1...Qc4
        • 2.Qa4#
        • 2.Qa5#
        • 2.bxc4#
      • 1...Qc1
        • 2.Qa4#
        • 2.Qa5#
      • 1...Qb6
        • 2.Qc3#
        • 2.Qa3#
        • 2.Qa4#
      • 1...Qc7
        • 2.Qa3#
        • 2.Qa4#
      • 1...a5
        • 2.Qa3#
        • 2.Qa4#
        • 2.Qxa5#
      • 1...Qxb5!
    • 1.Bc4?
      • threat
        • 2.d3#
        • 2.d4#
      • 1...Qxc4+
        • 2.bxc4#
      • 1...Qxe4
        • 2.Qa4#
      • 1...Qxb7
        • 2.d4#
      • 1...Rxe4
        • 2.Qa5#
      • 1...f2!
    • 1.Qc3+?
      • 1...Ka3
        • 2.Ra1#
      • 1...Qxc3!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Qa4#
        • 2.Qa5#
      • 1...Qxb5+
        • 2.d3#
      • 1...Qc4+
        • 2.bxc4#
      • 1...Qxb7
        • 2.d4#
      • 1...Rxb5
        • 2.Qa4#
      • 1...axb5
        • 2.Qa5#
      • 1...Qb6
        • 2.Qa4#
        • 2.d3#
        • 2.d4#
      • 1...Qc7
        • 2.Qa4#
      • 1...a5
        • 2.Qa4#
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 13
  • Sets
    • Q(e);N_GUARD,XP(H)::QAR1(A)
    • Q(e);N_GUARD::QAR1(A)
    • Q(e);N_GUARD,P_PINB(C)::QAR1(A)
    • Q(e);N_GUARD,XS(I)::QAR1(A)
    • R(c);N_GUARD,XP(H)::QAB1(A)
    • R(c);N_GUARD::QAB1(A),XR(c)
    • R(c);S_CUTQ(e)::QAR1(A)
    • R(c);N_GUARD::QAB1(A)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(3)
      • Vars
        • R(c);XS(I)::QAR1(A)
        • P(d);XS(I)::QAB1(A)
      • Refutation
        • Q(e);P_PINB(G),XS(I)
    • Try
      • B(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);CHECK,OGATE,XB(G)::R(B)+P(F),XQ(e)
        • Q(e);N_GUARD,XP(H)::QAR1(A)
        • Q(e);XS(J)::B(C)+P(E)
        • R(c);N_GUARD,XP(H)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::R(B)
      • Refutation
        • Q(e);XQ(A)
  • Actual
    • B(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(e);CHECK,N_GUARD,XB(G)::B(C)+P(E)
      • Q(e);CHECK,OGATE::R(B)+P(F),XQ(e)
      • Q(e);N_GUARD,XS(J)::B(C)+P(E)
      • R(c);XB(G)::QAR1(A)
      • P(d);XB(G)::QAB1(A)
      • Q(e);::QAR1(A)
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