MESON Chess Problem Database

Problem Display
PID: 161605 (Q1N1N2k/5K2/3P4/6P1/8/2Prp3/1B1q1R2/1Br5 w - - 0 1)

Airapetyan, Abel S

Die Schwalbe, 1981

Q1N1N2k/5K2/3P4/6P1/8/2Prp3/1B1q1R2/1Br5

#2

10 + 5

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Rh2#
    • 1...Rh1
      • 2.Qxh1#
    • 1...Rc2
      • 2.Qh1#
    • 1...Rcxc3
      • 2.Qh1#
  • Tries
    • 1.Sa7?
      • threat
        • 2.Sf6#
      • 1...Kh7
        • 2.Sf6#
      • 1...Qxc3
        • 2.Rh2#
      • 1...Rcxc3
        • 2.Qh1#
      • 1...Rdxc3
        • 2.Sc7#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Qxb2!
    • 1.Se7?
      • threat
        • 2.Sf6#
      • 1...Kh7
        • 2.Sf6#
      • 1...Qxc3
        • 2.Rh2#
      • 1...Rcxc3
        • 2.Qh1#
      • 1...Rdxc3
        • 2.Sc7#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Qxb2!
    • 1.Sf6?
      • threat
        • 2.Sb6#
        • 2.Sa7#
        • 2.Se7#
      • 1...Qxc3
        • 2.Rh2#
      • 1...Qxb2
        • 2.Sb6#
      • 1...Rcxc3
        • 2.Qh1#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Rdxc3!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sf6#
      • 1...Kh7
        • 2.Sf6#
      • 1...Qxc3
        • 2.Rh2#
      • 1...Rcxc3
        • 2.Qh1#
      • 1...Rdxc3
        • 2.Sc7#
      • 1...Rxd6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,P_SPINQ(b),XP(D)::R(C)
    • R(a);N_GUARD::QAB(H),XR(a)
    • R(a);N_GUARD::QAB(H)
    • R(a);N_GUARD,P_SPINR(a),XP(D)::QAB(H)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAR(H)+S(J)
      • Vars
        • K(e);P-FLIGHT,P_SPINR(c)::S(J)
        • Q(b);N_GUARD,P_SPINQ(b),XP(D)::R(C)
        • R(a);N_GUARD,P_SPINR(a),XP(D)::QAB(H)
        • R(c);P_SPINR(c),XP(D)::QAR(H)+S(J)
        • R(c);XP(F)::QAR(H)+S(J),XR(c)
      • Refutation
        • Q(b);XB(B)
    • Try
      • S(I);
      • Threat
        • QAR(H)+S(J)
      • Vars
        • K(e);P-FLIGHT,P_SPINR(c)::S(J)
        • Q(b);N_GUARD,P_SPINQ(b),XP(D)::R(C)
        • R(a);N_GUARD,P_SPINR(a),XP(D)::QAB(H)
        • R(c);P_SPINR(c),XP(D)::QAR(H)+S(J)
        • R(c);XP(F)::QAR(H)+S(J),XR(c)
      • Refutation
        • Q(b);XB(B)
    • Try
      • S(J);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);N_GUARD,XP(D)::R(C)
        • Q(b);XB(B)::QAR(H)+S(I)
        • R(a);N_GUARD,XP(D)::QAB(H)
        • R(c);XP(F)::QAR(H)+S(I),XR(c)
      • Refutation
        • R(c);XP(D)
  • Actual
    • S(I);
    • Threat
      • QAR(H)+S(J)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(c)::S(J)
      • Q(b);N_GUARD,P_SPINQ(b),XP(D)::R(C)
      • R(a);N_GUARD,P_SPINR(a),XP(D)::QAB(H)
      • R(c);P_SPINR(c),XP(D)::QAR(H)+S(J)
      • R(c);XP(F)::QAR(H)+S(J),XR(c)
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