MESON Chess Problem Database

Problem Display
PID: 204949 (BbN1nK2/1n1PRQ1p/p2p4/P1k2N2/P4pRr/P5p1/5r1q/6B1 w - - 0 1)

Ugren, Ljubomir

Phenix, 1994

BbN1nK2/1n1PRQ1p/p2p4/P1k2N2/P4pRr/P5p1/5r1q/6B1

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qc4#
    • 1...Sxa5
      • 2.Qd5#
    • 1...Sd8
      • 2.Qd5#
    • 1...f3
      • 2.Qc4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kc6
        • 2.Qc4#
      • 1...Sxa5
        • 2.Qd5#
      • 1...Qh1
        • 2.Qc4#
      • 1...Qg2
        • 2.Qc4#
      • 1...Rc2
        • 2.Qd5#
      • 1...Rd2
        • 2.Qc4#
      • 1...Rh5
        • 2.Qc4#
      • 1...Sf6
        • 2.Qc4#
      • 1...Sc7
        • 2.Qc4#
      • 1...d5
        • 2.Qxd5#
      • 1...fxe3!
    • 1.Sb6?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...Kc6
        • 2.Qc4#
      • 1...Qh1
        • 2.Qc4#
      • 1...Qg2
        • 2.Qc4#
      • 1...Sf6
        • 2.Qc4#
      • 1...Sc7
        • 2.Qc4#
      • 1...d5
        • 2.Qxd5#
      • 1...Sxa5!
    • 1.Re4?
      • threat
        • 2.Rc4#
        • 2.Qc4#
      • 1...Kc6
        • 2.Rc4#
      • 1...Sxa5
        • 2.Qd5#
      • 1...d5!
    • 1.Re5+?
      • 1...Kc6
        • 2.dxe8Q#
        • 2.dxe8B#
        • 2.d8S#
      • 1...d5
        • 2.Qxd5#
      • 1...dxe5!
  • Keys
    • 1.Re3!
      • threat
        • 2.Rc3#
      • 1...Kc6
        • 2.Rc3#
      • 1...Sxa5
        • 2.Qd5#
      • 1...fxe3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(f);N_SPINR(a),P-FLIGHT,P_SPINS(i)::QAR2(I)
    • S(i);XP(E)::QAR1(I)
    • S(i);::QAR1(I)
    • P(d);::QAR1(I)
  • Tries
    • Try
      • S(F);N_PINR(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(f);P_SPINP(d),S_FLIGHT::QAR1(I)
        • K(f);P-FLIGHT,P_SPINS(i)::QAR2(I)
        • S(i);XP(E)::QAR1(I)
        • Q(b);::QAR1(I)
        • R(a);::QAR1(I)
        • R(e);::QAR1(I)
        • S(l);::QAR1(I)
        • P(h);::QAR1(I),XP(h)
      • Refutation
        • P(d);P_PINQ(I),XS(F)
    • Try
      • S(K);
      • Threat
        • DUALS(2)
      • Vars
        • K(f);N_SPINR(a),P-FLIGHT,P_SPINS(i)::QAR2(I)
        • Q(b);::QAR1(I)
        • S(l);::QAR1(I)
        • P(h);::QAR1(I),XP(h)
      • Refutation
        • S(i);XP(E)
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(f);N_SPINR(a),P-FLIGHT,P_SPINS(i)::R(H)
        • S(i);XP(E)::QAR1(I)
      • Refutation
        • P(h);
    • Try
      • R(H);CHECK
      • Vars
        • P(h);P_SPINP(h)::QAR1(I),XP(h)
      • Refutation
        • P(h);XR(H)
  • Actual
    • R(H);N_PINR(a)
    • Threat
      • R(H)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(i)::R(H)
      • S(i);XP(E)::QAR1(I)
      • P(d);XR(H)::QAR1(I)
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