MESON Chess Problem Database

Problem Display
PID: 272117 (2R5/2q4B/8/B7/pPN1Q3/pkN3R1/bp1pKP2/nr1rb3 w - - 0 1)

Janev, Zoran

Pat a Mat, 2001

2R5/2q4B/8/B7/pPN1Q3/pkN3R1/bp1pKP2/nr1rb3

#2

10 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Sd5#
      • 2.Sxa5#
    • 1...Qd8
      • 2.Sd5#
    • 1...Qxc4+
      • 2.Qxc4#
    • 1...Qc6
      • 2.Sxb1#
      • 2.Sxd1#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Qb7
      • 2.Sxb1#
      • 2.Sxd1#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Qd7
      • 2.Sd5#
    • 1...Qe7
      • 2.Sxb1#
      • 2.Sxd1#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Qxh7
      • 2.Sxb1#
      • 2.Sxd1#
      • 2.Sb5#
      • 2.Sd5#
    • 1...Qxc8
      • 2.Sxb1#
      • 2.Sxd1#
      • 2.Sb5#
      • 2.Sd5#
  • Tries
    • 1.Sxa2+?
      • 1...Kxa2
        • 2.Rxa3#
      • 1...Qxg3!
    • 1.Bxc7?
      • threat
        • 2.Sd5#
        • 2.Sa5#
      • 1...Bxf2
        • 2.Sa5#
      • 1...Rbc1
        • 2.Sa5#
      • 1...Rdc1
        • 2.Sa5#
      • 1...Sc2
        • 2.Sa5#
      • 1...Kxb4!
    • 1.Bg8?
      • threat
        • 2.Sxd2#
      • 1...Qxc4+
        • 2.Bxc4#
      • 1...Qf7!
    • 1.Qc2+?
      • 1...Kxc4
        • 2.Rg4#
      • 1...Sxc2!
    • 1.Qd5?
      • threat
        • 2.Sxd2#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qxc4+
        • 2.Qxc4#
      • 1...Qe7+
        • 2.Se3#
        • 2.Se5#
      • 1...Qxh7
        • 2.Se3#
      • 1...Qxa5!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sxd2#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qxc4+
        • 2.Qxc4#
      • 1...Qxa5
        • 2.Sd5#
      • 1...Qxh7
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(k);N_GUARD::R(D)+S(C)
    • Q(k);CHECK,OGATE,XS(F)::QAB1(G),XQ(k)
  • Tries
    • Try
      • S(C);CHECK,XB(e)
      • Vars
        • K(i);OGATE,S_FLIGHT,XS(C)::R1(D),XP(h)
      • Refutation
        • Q(k);XR(D)
    • Try
      • B(H);XQ(k)
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XP(B)::S(F)
        • R(b);::S(F)
        • R(c);::S(F)
        • S(a);::S(F)
      • Refutation
        • K(i);P-FLIGHT,XP(E)
    • Try
      • B(I);
      • Threat
        • B(I)+S(F),DCHECK,XP(g)
      • Vars
        • Q(k);CHECK,OGATE,P_SPINQ(k),XS(F)::B(I),XQ(k)
      • Refutation
        • Q(k);
    • Try
      • Q(G);CHECK
      • Vars
        • K(i);P_SPINQ(k),S_CUTS(a),S_FLIGHT,XS(F)::R(D)
      • Refutation
        • S(a);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAB(G)+S(F),DCHECK,XP(g)
      • Vars
        • Q(k);CHECK,N_GUARD::QAB(G)+S(F),XQ(k)
        • Q(k);CHECK,OGATE,P_SPINQ(k),XS(F)::QAB1(G),XQ(k)
        • Q(k);N_GUARD,XB(I)::QAB(G)+S(F)
      • Refutation
        • Q(k);XB(H)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+S(F),DCHECK,XP(g)
    • Vars
      • Q(k);CHECK,N_GUARD::QAB(G)+S(F),XQ(k)
      • Q(k);CHECK,OGATE,P_SPINQ(k),XS(F)::QAB1(G),XQ(k)
      • Q(k);N_GUARD,XB(H)::R(D)+S(C)
      • Q(k);N_GUARD,XB(I)::QAB(G)+S(F)
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