MESON Chess Problem Database

Problem Display
PID: 15386 (2b5/N7/2R5/3k4/2p3pr/p1p1K1BP/nP2Nn2/1Q6 w - - 0 1)

Hoffmann, Fritz

Junge Welt, 1983

2b5/N7/2R5/3k4/2p3pr/p1p1K1BP/nP2Nn2/1Q6

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qxf5#
    • 1...Ba6
      • 2.Qf5#
    • 1...Bb7
      • 2.Qf5#
    • 1...Sc1
      • 2.Sxc3#
    • 1...Sb4
      • 2.Sxc3#
    • 1...Sd1+
      • 2.Qxd1#
    • 1...Sh1
      • 2.Qe4#
      • 2.Qd1#
      • 2.Qxh1#
    • 1...Sd3
      • 2.Qh1#
    • 1...Sxh3
      • 2.Qe4#
      • 2.Qd1#
      • 2.Qh1#
    • 1...Se4
      • 2.Qxe4#
  • Tries
    • 1.Qxa2?
      • threat
        • 2.Sxc3#
        • 2.Qxc4#
      • 1...cxb2
        • 2.Sc3#
        • 2.Qxc4#
      • 1...gxh3
        • 2.Sxc3#
      • 1...Ba6
        • 2.Sxc3#
      • 1...Se4
        • 2.Qxc4#
      • 1...c2
        • 2.Sc3#
        • 2.Qxc4#
      • 1...Sd1+!
    • 1.Qd1+?
      • 1...Sd3
        • 2.Qh1#
      • 1...Sxd1+!
    • 1.Qh1+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxh1!
    • 1.bxc3?
      • threat
        • 2.Qb5#
      • 1...Sd1+
        • 2.Qxd1#
      • 1...Sxc3
        • 2.Sxc3#
      • 1...Ba6
        • 2.Qf5#
      • 1...Sd3
        • 2.Qh1#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb4!
    • 1.b3?
      • threat
        • 2.bxc4#
      • 1...Sd1+
        • 2.Qxd1#
      • 1...cxb3
        • 2.Qxb3#
      • 1...Ba6
        • 2.Qf5#
      • 1...gxh3!
    • 1.b4?
      • threat
        • 2.Rd6#
      • 1...Sd1+
        • 2.Qxd1#
      • 1...Sxb4
        • 2.Sxc3#
      • 1...cxb4 ep
        • 2.Qxb3#
      • 1...Se4
        • 2.Qxe4#
      • 1...Rh6!
  • Keys
    • 1.bxa3!
      • threat
        • 2.Qb5#
      • 1...Sd1+
        • 2.Qxd1#
      • 1...Ba6
        • 2.Qf5#
      • 1...Sb4
        • 2.Sxc3#
      • 1...Sd3
        • 2.Qh1#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • B(i);N_GUARD::QAR2(A),XB(i)
    • B(i);N_GUARD::QAR2(A)
    • S(a);N_GUARD::S(C),XP(d)
    • S(b);CHECK,N_GUARD::QAR(A),XS(b)
    • S(b);N_GUARD::QAB(A)
    • S(b);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • Q(A);P_PINP(e),XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XP(F)::S(C),XP(d)
        • B(i);::S(C),XP(d)
        • S(b);::QAB1(A),XP(e)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(A)
      • Refutation
        • S(b);CHECK,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • P(B);XP(d)
      • Threat
        • QAR2(A)
      • Vars
        • S(b);CHECK,N_GUARD::QAR(A),XS(b)
        • S(a);XP(B)::S(C),XS(a)
        • B(i);N_GUARD::QAR2(A)
        • S(b);N_GUARD::QAB(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • S(a);
    • Try
      • P(B);
      • Threat
        • P(B),XP(e)
      • Vars
        • S(b);CHECK,N_GUARD::QAR(A),XS(b)
        • P(e);OGATE,XP(B)::QAB(A),XP(e)
        • B(i);N_GUARD::QAR2(A)
      • Refutation
        • P(f);XP(F)
    • Try
      • P(B);
      • Threat
        • R1(G)
      • Vars
        • S(b);CHECK,N_GUARD::QAR(A),XS(b)
        • S(a);N_GUARD,XP(B)::S(C),XP(d)
        • P(e);EP,OGATEB,XP(B)::QAB(A),XP(e)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • R(g);
  • Actual
    • P(B);XP(c)
    • Threat
      • QAR2(A)
    • Vars
      • S(b);CHECK,N_GUARD::QAR(A),XS(b)
      • B(i);N_GUARD::QAR2(A)
      • S(a);N_GUARD::S(C),XP(d)
      • S(b);N_GUARD::QAB(A)
      • S(b);N_GUARD::QAB1(A),XS(b)
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