MESON Chess Problem Database

Problem Display
PID: 121992 (2Rb4/Q4P1B/1p1p2pr/pn1p4/3k2pr/1KpP3p/4PP1B/6N1 w - - 0 1)

Heinonen, Unto

Suomen Tehtavaniekat TT, 1974

2Rb4/Q4P1B/1p1p2pr/pn1p4/3k2pr/1KpP3p/4PP1B/6N1

#2

10 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Qxb6#
    • 1...Bf6
      • 2.Qxb6#
    • 1...Be7
      • 2.Qxb6#
    • 1...Sc7
      • 2.Qxb6#
    • 1...g3
      • 2.Sf3#
    • 1...a4+
      • 2.Qxa4#
    • 1...g5
      • 2.e3#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.e3#
      • 1...a4+
        • 2.Qxa4#
      • 1...g3
        • 2.Sf3#
      • 1...Bg5
        • 2.Qxb6#
      • 1...Sxc3!
    • 1.Qxa5?
      • threat
        • 2.Qb4#
        • 2.Qa4#
      • 1...Bc7
        • 2.Qb4#
      • 1...g3
        • 2.Sf3#
      • 1...Sa3
        • 2.Qxc3#
      • 1...Sc7
        • 2.Qxc3#
        • 2.Qb4#
        • 2.Qxb6#
      • 1...bxa5!
    • 1.f8Q?
      • threat
        • 2.Qf4#
      • 1...a4+
        • 2.Qxa4#
      • 1...Sc7
        • 2.Qxb6#
      • 1...g3
        • 2.Sf3#
      • 1...Bg5
        • 2.Qxb6#
      • 1...Bf6
        • 2.Qxb6#
        • 2.Qxf6#
      • 1...g5
        • 2.e3#
      • 1...Bc7!
  • Keys
    • 1.f8S!
      • threat
        • 2.Se6#
      • 1...a4+
        • 2.Qxa4#
      • 1...Sc7
        • 2.Qxb6#
      • 1...g3
        • 2.Sf3#
      • 1...g5
        • 2.e3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • B(m);N_GUARD::QAB(G),XP(i)
    • S(g);S_CUTB(m)::QAB(G),XP(i)
    • P(d);N_GUARD::S(A)
    • P(f);CHECK,OGATE::QAR(G),XP(f)
    • P(k);::P(B)
  • Tries
    • Try
      • R(J);XP(a)
      • Threat
        • P(B)
      • Vars
        • P(f);CHECK,OGATE::QAR(G),XP(f)
        • P(d);N_GUARD::S(A)
        • B(m);N_GUARD::QAB(G),XP(i)
      • Refutation
        • S(g);XR(J)
    • Try
      • Q(G);N_PINP(i),XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(m);::QAR2(G)
        • P(d);N_GUARD::S(A)
        • S(g);N_GUARD::QAB1(G),XP(a)
      • Refutation
        • P(i);XQ(G)
    • Try
      • P(H);
      • Threat
        • QAR2(H)
      • Vars
        • P(f);CHECK,OGATE::QAR(G),XP(f)
        • S(g);S_CUTB(m)::QAB(G),XP(i)
        • P(d);N_GUARD::S(A)
        • B(m);N_GUARD::QAB(G),XP(i)
        • P(k);::P(B)
      • Refutation
        • B(m);
  • Actual
    • P(H);
    • Threat
      • S(H)
    • Vars
      • P(f);CHECK,OGATE::QAR(G),XP(f)
      • S(g);S_CUTB(m)::QAB(G),XP(i)
      • P(d);N_GUARD::S(A)
      • P(k);::P(B)
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