MESON Chess Problem Database

Problem Display
PID: 140010 (4N1Bn/3p2p1/2pp2kp/2RP2P1/r2p1QNK/3qP3/1R6/b4n2 w - - 0 1)

Hjelle, David

5th Comm., Suomen Tehtavaniekat, 1955

4N1Bn/3p2p1/2pp2kp/2RP2P1/r2p1QNK/3qP3/1R6/b4n2

#2

10 + 12

23 Die Schwalbe 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Qe4#
    • 1...Qc4
      • 2.Qe4#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qb5
      • 2.Qe4#
    • 1...Qa6
      • 2.Qe4#
    • 1...Qd1
      • 2.Qe4#
    • 1...Qd2
      • 2.Qe4#
    • 1...Qa3
      • 2.Qe4#
    • 1...Qb3
      • 2.Qe4#
    • 1...Qc3
      • 2.Qe4#
    • 1...Sf7
      • 2.Qxf7#
    • 1...dxc5
      • 2.Se5#
    • 1...hxg5+
      • 2.Qxg5#
  • Tries
    • 1.Sxh6?
      • threat
        • 2.Qxd6#
      • 1...Qxe3
        • 2.Qf5#
      • 1...dxc5
        • 2.Qd6#
      • 1...gxh6
        • 2.Qf6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...dxe3!
    • 1.Rf2?
      • threat
        • 2.Qxd6#
      • 1...hxg5+
        • 2.Qxg5#
      • 1...Qxe3
        • 2.Qf5#
      • 1...dxc5
        • 2.Se5#
        • 2.Qd6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...dxe3!
    • 1.dxc6?
      • threat
        • 2.Qxd6#
      • 1...hxg5+
        • 2.Rxg5#
        • 2.Qxg5#
      • 1...Qxe3
        • 2.Qf5#
      • 1...dxc5
        • 2.Se5#
      • 1...Qc4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Qb3
        • 2.Qe4#
        • 2.Qf5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...d5
        • 2.Se5#
      • 1...dxe3!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Se5#
      • 1...hxg5+
        • 2.Qxg5#
      • 1...Qxe3
        • 2.Qf5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::QAB(C)
    • Q(c);N_GUARD::QAB(C),XQ(c)
    • S(l);N_GUARD::QAB1(C),XS(l)
    • P(g);N_GUARD,XR(F)::S(D)
    • P(i);CHECK,OGATE,XP(H)::QAR1(C),XP(i)
  • Tries
    • Try
      • S(D);XP(i)
      • Threat
        • QAR(C),XP(g)
      • Vars
        • Q(c);N_GUARD,XP(B)::QAB1(C)
        • P(g);XR(F)::QAR(C)
        • P(k);N_GUARD,XS(D)::QAR1(C)
        • Q(c);N_GUARD,P_PINQ(C)::QAB(C),XQ(c)
        • Q(c);N_GUARD::QAB1(C),XQ(c)
        • S(l);N_GUARD::QAB1(C),XS(l)
      • Refutation
        • P(e);P_PINQ(C),XP(B)
    • Try
      • R(A);
      • Threat
        • QAR(C),XP(g)
      • Vars
        • P(i);CHECK,OGATE,XP(H)::QAR1(C),XP(i)
        • Q(c);N_GUARD,XP(B)::QAB1(C)
        • Q(c);N_GUARD::QAB(C),XQ(c)
        • Q(c);N_GUARD::QAB1(C),XQ(c)
        • S(l);N_GUARD::QAB1(C),XS(l)
      • Refutation
        • P(e);XP(B)
    • Try
      • P(G);XP(f)
      • Threat
        • QAR(C),XP(g)
      • Vars
        • Q(c);N_GUARD,XP(B)::QAB1(C)
        • P(g);N_GUARD,XR(F)::S(D)
        • Q(c);N_GUARD::QAB(C),XQ(c)
        • Q(c);N_GUARD::QAB1(C),XQ(c)
        • S(l);N_GUARD::QAB1(C),XS(l)
        • P(g);N_GUARD::S(D)
      • Refutation
        • P(e);XP(B)
  • Actual
    • S(I);XP(g)
    • Threat
      • S(D)
    • Vars
      • P(i);CHECK,OGATE,XP(H)::QAR1(C),XP(i)
      • Q(c);N_GUARD,XP(B)::QAB1(C)
      • Q(c);N_GUARD::QAB(C),XQ(c)
      • Q(c);N_GUARD::QAB1(C),XQ(c)
      • S(l);N_GUARD::QAB1(C),XS(l)
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