MESON Chess Problem Database

Problem Display
PID: 52940 (5b2/3NN1p1/1pP2B2/qP5R/2k2pKR/r1ppppPP/P4r2/1Q1n3n w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 2004

5b2/3NN1p1/1pP2B2/qP5R/2k2pKR/r1ppppPP/P4r2/1Q1n3n

#2

12 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Sxb6#
    • 1...Qa4
      • 2.Sxb6#
    • 1...Qxb5
      • 2.Qxb5#
    • 1...Qa8
      • 2.Sxb6#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Ra4
      • 2.Qb3#
    • 1...d2
      • 2.Qe4#
    • 1...fxg3
      • 2.Kf5#
      • 2.Kg5#
  • Tries
    • 1.Qxd3+?
      • 1...Kb4
        • 2.Qe4#
        • 2.Qd4#
      • 1...Kxd3!
    • 1.Qb4+?
      • 1...Qxb4
        • 2.Sxb6#
      • 1...Kxb4!
  • Keys
    • 1.Kxf4!
      • threat
        • 2.Ke5#
        • 2.Kf5#
        • 2.Kg5#
      • 1...g5+
        • 2.Kxg5#
      • 1...Qxb5
        • 2.Qxb5#
      • 1...Bxe7
        • 2.Ke5#
      • 1...Sxg3
        • 2.Kxg3#
      • 1...gxf6
        • 2.Kf5#
      • 1...Rb2
        • 2.Kxf3#
      • 1...Rb3
        • 2.Qxb3#
      • 1...Sb2
        • 2.Kxe3#
      • 1...Qb4
        • 2.Sxb6#
      • 1...c2
        • 2.Kf5#
        • 2.Kg5#
      • 1...g6
        • 2.Ke5#
        • 2.Kg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(k);N_GUARD::S(K),XP(l)
    • Q(k);OGATE,XP(G)::QAB1(A),XQ(k)
    • R(d);N_GUARD::QAB1(A),XR(d)
    • R(d);N_GUARD::QAB1(A)
    • P(f);OGATE::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK,XP(f)
      • Refutation
        • K(i);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(k);SBLOCK,XQ(A)::S(K),XP(l)
      • Refutation
        • K(i);P-FLIGHT,XQ(A)
  • Actual
    • K(E);P-FLIGHT,XP(j)
    • Threat
      • DUALS(3)
    • Vars
      • P(m);CHECK::R(F)+K(E),XP(m)
      • Q(k);OGATE,XP(G)::QAB1(A),XQ(k)
      • B(n);XS(L)::R(F)+K(E)
      • S(b);XP(C)::R(F)+K(E),XS(b)
      • P(m);XB(J)::R(F)+K(E)
      • R(c);::R(F)+K(E),XP(h)
      • R(d);N_GUARD::QAB1(A),XR(d)
      • S(a);::R(F)+K(E),XP(g)
      • Q(k);N_GUARD::S(K),XP(l)
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