MESON Chess Problem Database

Problem Display
PID: 272144 (K1N4q/3PB3/5p2/1p1R1p2/p1k3n1/5Q2/1P6/2n5 w - - 0 1)

Dittrich, Stefan

Muller, Dieter

diagrammes, 1977

K1N4q/3PB3/5p2/1p1R1p2/p1k3n1/5Q2/1P6/2n5

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7
      • 2.Sb6#
    • 1...Qh1
      • 2.Sb6#
    • 1...Qh2
      • 2.Sb6#
    • 1...Qh3
      • 2.Sb6#
    • 1...Qh4
      • 2.Sb6#
    • 1...Qh5
      • 2.Sb6#
    • 1...Qh6
      • 2.Sb6#
    • 1...Qh7
      • 2.Sb6#
    • 1...Qxc8+
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Sa2
      • 2.Qd3#
    • 1...Se2
      • 2.Qd3#
    • 1...Sb3
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Qd5#
        • 2.Qc3#
      • 1...Qxc8+
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sd3
        • 2.Qxd3#
      • 1...b4
        • 2.Qd5#
      • 1...Qh1
        • 2.Sb6#
      • 1...Qh3
        • 2.Sb6#
        • 2.Qd5#
      • 1...Qg8
        • 2.Qc3#
      • 1...Sa2
        • 2.Qd5#
        • 2.Qd3#
      • 1...Se2
        • 2.Qd5#
        • 2.Qd3#
      • 1...Se3!
    • 1.Rd2?
      • threat
        • 2.Qd5#
        • 2.Qc3#
      • 1...Qxc8+
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sd3
        • 2.Qxd3#
      • 1...b4
        • 2.Qd5#
      • 1...Qh1
        • 2.Sb6#
      • 1...Qh3
        • 2.Sb6#
        • 2.Qd5#
      • 1...Qg8
        • 2.Qc3#
      • 1...Sa2
        • 2.Qd5#
        • 2.Qd3#
      • 1...Se2
        • 2.Qd5#
        • 2.Qd3#
      • 1...Se3!
    • 1.Rc5+?
      • 1...Kb4
        • 2.Qc3#
      • 1...Kd4!
    • 1.b3+?
      • 1...Sxb3
        • 2.Qd3#
      • 1...axb3!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Rd4#
      • 1...Qxc8+
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Qh1
        • 2.Sb6#
      • 1...Se2
        • 2.Qd3#
      • 1...Sb3
        • 2.Qd3#
      • 1...b4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_PINS(G)::S(G)
    • Q(h);CHECK,OGATE,XS(G)::PXQ(h)=Q
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);CHECK,OGATE,XS(G)::PXQ(h)=Q
        • S(a);N_GUARD::QAB1(B),XS(a)
        • P(e);::QAB1(B)
        • Q(h);N_PINS(G),P_PINQ(B)::S(G)
        • Q(h);::QAR1(B)
      • Refutation
        • S(d);
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);CHECK,OGATE,XS(G)::PXQ(h)=Q
        • S(a);N_GUARD::QAB1(B),XS(a)
        • P(e);::QAB1(B)
        • Q(h);N_PINS(G),P_PINQ(B)::S(G)
        • Q(h);::QAR1(B)
      • Refutation
        • S(d);
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • S(a);XP(A)::QAB1(B)
      • Refutation
        • P(b);XP(A)
  • Actual
    • Q(B);
    • Threat
      • R1(C)
    • Vars
      • Q(h);CHECK,OGATE,XS(G)::PXQ(h)=Q
      • S(a);N_GUARD::QAB1(B),XS(a)
      • Q(h);N_PINS(G),P_PINR(C)::S(G)
      • S(a);N_GUARD::QAB1(B)
      • P(e);SBLOCK::R1(C)
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