MESON Chess Problem Database
Problem Display
PID: 32540 (2n1NQB1/5qp1/1pp1p1P1/RppkBpnR/3P4/1P1KPP1p/2N5/8 w - - 0 1)
Malmstrom, Birger Georg Christens
Comm., Good Companions (May), 1924
#2
13 + 12
| 3391 | Het Half Pin Thema | 1947 |
SOLUTION
- SOUND
- Sets
- 1...Qxg6
- 2.Sc7#
- 1...Qxg8
- 2.Sc7#
- 1...Qf6
- 2.Sc7#
- 1...Qc7
- 2.Sxc7#
- 1...Qxf8
- 2.Sc7#
- 1...Sd6
- 2.Qxd6#
- 1...Sa7
- 2.Qd6#
- 1...Se7
- 2.Sc7#
- 1...b4
- 2.Sxb4#
- 1...c4+
- 2.bxc4#
- 1...bxa5
- 2.Qxc5#
- 1...Qxg6
- Tries
- 1.Bg3?
- 1...c4+
- 2.bxc4#
- 1...Qxg6
- 2.Sc7#
- 1...Qxe8
- 2.Qxf5#
- 1...Qxg8
- 2.Sc7#
- 1...Qxf8
- 2.Sc7#
- 1...Sxf3
- 2.e4#
- 1...cxd4
- 2.Sb4#
- 1...bxa5
- 2.Qxc5#
- 1...e5
- 2.Sc7#
- 1...Qf6
- 2.Sc7#
- 1...Qa7
- 2.Qxf5#
- 1...Qb7
- 2.Qxf5#
- 1...Qc7
- 2.Sxc7#
- 1...Qd7
- 2.Qxf5#
- 1...Qe7
- 2.Qxf5#
- 1...Se4
- 2.fxe4#
- 1...Sh7
- 2.e4#
- 1...Sd6
- 2.Qxd6#
- 1...Sa7
- 2.Qd6#
- 1...Se7
- 2.Sc7#
- 1...b4
- 2.Sxb4#
- 1...f4
- 2.e4#
- 1...h2!
- 1...c4+
- 1.Bf4?
- 1...c4+
- 2.bxc4#
- 1...Qxg6
- 2.Sc7#
- 1...Qxe8
- 2.Qxf5#
- 1...Qxg8
- 2.Sc7#
- 1...Qxf8
- 2.Sc7#
- 1...Sxf3
- 2.e4#
- 1...cxd4
- 2.Sb4#
- 1...bxa5
- 2.Qxc5#
- 1...e5
- 2.Sc7#
- 1...Qf6
- 2.Sc7#
- 1...Qa7
- 2.Qxf5#
- 1...Qb7
- 2.Qxf5#
- 1...Qc7
- 2.Sxc7#
- 1...Qd7
- 2.Qxf5#
- 1...Qe7
- 2.Qxf5#
- 1...Se4
- 2.fxe4#
- 1...Sh7
- 2.e4#
- 1...Sd6
- 2.Qxd6#
- 1...Sa7
- 2.Qd6#
- 1...Se7
- 2.Sc7#
- 1...b4
- 2.Sxb4#
- 1...h2!
- 1...c4+
- 1.Bxf7?
- threat
- 2.Sc7#
- 1...c4+
- 2.bxc4#
- 1...cxd4!
- threat
- 1.Qxf7?
- threat
- 2.Sc7#
- 1...c4+
- 2.bxc4#
- 1...cxd4!
- threat
- 1.e4+?
- 1...Sxe4
- 2.Se3#
- 1...fxe4+!
- 1...Sxe4
- 1.gxf7?
- threat
- 2.Sc7#
- 1...c4+
- 2.bxc4#
- 1...cxd4!
- threat
- 1.Bg3?
- Keys
- 1.Bh2!
- 1...c4+
- 2.bxc4#
- 1...Qxg6
- 2.Sc7#
- 1...Qxe8
- 2.Qxf5#
- 1...Qxg8
- 2.Sc7#
- 1...Qxf8
- 2.Sc7#
- 1...Sxf3
- 2.e4#
- 1...cxd4
- 2.Sb4#
- 1...bxa5
- 2.Qxc5#
- 1...e5
- 2.Sc7#
- 1...Qf6
- 2.Sc7#
- 1...Qa7
- 2.Qxf5#
- 1...Qb7
- 2.Qxf5#
- 1...Qc7
- 2.Sxc7#
- 1...Qd7
- 2.Qxf5#
- 1...Qe7
- 2.Qxf5#
- 1...Se4
- 2.fxe4#
- 1...Sh7
- 2.e4#
- 1...Sd6
- 2.Qxd6#
- 1...Sa7
- 2.Qd6#
- 1...Se7
- 2.Sc7#
- 1...b4
- 2.Sxb4#
- 1...f4
- 2.e4#
- 1...c4+
- 1.Bh2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 11
- REMOVED MATES = 0
- Sets
- Q(j);N_GUARD,P_SPINP(i),XP(J)::S(K)
- Q(j);N_GUARD,XB(M)::S(K)
- Q(j);N_GUARD,P_SPINP(i)::S(K)
- Q(j);N_GUARD,P_SPINP(i)::S(K),XQ(j)
- Q(j);N_GUARD,P_SPINP(i),XQ(L)::S(K)
- S(l);N_GUARD::QAR1(L),XS(l)
- S(l);N_GUARD::QAR1(L)
- S(l);S_CUTQ(j)::S(K)
- P(b);P_SPINP(c)::S(A),XP(b)
- P(c);CHECK,OGATE,P_SPINP(b)::P(B),XP(c)
- P(g);N_GUARD,XR(G)::QAR1(L),XP(c)
- Tries
- Try
- B(H);
- Vars
- P(c);CHECK,OGATE,P_SPINP(b)::P(B),XP(c)
- Q(j);N_GUARD,P_SPINP(i),XP(J)::S(K)
- Q(j);OGATE,P_SPINP(i),XS(K)::QAR2(L),XP(e)
- Q(j);N_GUARD,XB(M)::S(K)
- Q(j);N_GUARD,P_SPINP(i),XQ(L)::S(K)
- S(f);N_GUARD,P_SPINP(e),XP(E)::P(D)
- P(c);N_GUARD,P_SPINP(b),XP(F)::S(A)
- P(g);N_GUARD,XR(G)::QAR1(L),XP(c)
- P(i);P_SPINQ(j)::S(K)
- Q(j);N_GUARD,P_SPINP(i)::S(K)
- Q(j);OGATE,P_SPINP(i)::QAR2(L),XP(e)
- Q(j);N_GUARD,P_SPINP(i)::S(K),XQ(j)
- S(f);OGATE,P_SPINP(e)::P(E),XS(f)
- S(f);N_GUARD,P_SPINP(e)::P(D)
- S(l);N_GUARD::QAR1(L),XS(l)
- S(l);N_GUARD::QAR1(L)
- S(l);S_CUTQ(j)::S(K)
- P(b);P_SPINP(c)::S(A),XP(b)
- P(e);N_GUARD,P_SPINS(f)::P(D)
- Refutation
- P(a);
- Try
- B(H);
- Vars
- P(c);CHECK,OGATE,P_SPINP(b)::P(B),XP(c)
- Q(j);N_GUARD,P_SPINP(i),XP(J)::S(K)
- Q(j);OGATE,P_SPINP(i),XS(K)::QAR2(L),XP(e)
- Q(j);N_GUARD,XB(M)::S(K)
- Q(j);N_GUARD,P_SPINP(i),XQ(L)::S(K)
- S(f);N_GUARD,P_SPINP(e),XP(E)::P(D)
- P(c);N_GUARD,P_SPINP(b),XP(F)::S(A)
- P(g);N_GUARD,XR(G)::QAR1(L),XP(c)
- P(i);P_SPINQ(j)::S(K)
- Q(j);N_GUARD,P_SPINP(i)::S(K)
- Q(j);OGATE,P_SPINP(i)::QAR2(L),XP(e)
- Q(j);N_GUARD,P_SPINP(i)::S(K),XQ(j)
- S(f);OGATE,P_SPINP(e)::P(E),XS(f)
- S(f);N_GUARD,P_SPINP(e)::P(D)
- S(l);N_GUARD::QAR1(L),XS(l)
- S(l);N_GUARD::QAR1(L)
- S(l);S_CUTQ(j)::S(K)
- P(b);P_SPINP(c)::S(A),XP(b)
- Refutation
- P(a);
- Try
- B(M);P_PINP(i),XQ(j)
- Threat
- S(K)
- Vars
- P(c);CHECK,N_SPINP(i),OGATE,P_SPINP(b)::P(B),XP(c)
- Refutation
- P(c);N_SPINP(i),P_SPINP(b),XP(F)
- Try
- Q(L);P_PINP(i),XQ(j)
- Threat
- S(K)
- Vars
- P(c);CHECK,N_SPINP(i),OGATE,P_SPINP(b)::P(B),XP(c)
- Refutation
- P(c);N_SPINP(i),P_SPINP(b),XP(F)
- Try
- P(D);CHECK
- Vars
- S(f);XP(D)::S(A)
- Refutation
- P(e);CHECK,XP(D)
- Try
- P(J);XQ(j)
- Threat
- S(K)
- Vars
- P(c);CHECK,OGATE,P_SPINP(b)::P(B),XP(c)
- Refutation
- P(c);P_SPINP(b),XP(F)
- Try
- Actual
- B(H);
- Vars
- P(c);CHECK,OGATE,P_SPINP(b)::P(B),XP(c)
- Q(j);N_GUARD,P_SPINP(i),XP(J)::S(K)
- Q(j);OGATE,P_SPINP(i),XS(K)::QAR2(L),XP(e)
- Q(j);N_GUARD,XB(M)::S(K)
- Q(j);N_GUARD,P_SPINP(i),XQ(L)::S(K)
- S(f);N_GUARD,P_SPINP(e),XP(E)::P(D)
- P(c);N_GUARD,P_SPINP(b),XP(F)::S(A)
- P(g);N_GUARD,XR(G)::QAR1(L),XP(c)
- P(i);P_SPINQ(j)::S(K)
- Q(j);N_GUARD,P_SPINP(i)::S(K)
- Q(j);OGATE,P_SPINP(i)::QAR2(L),XP(e)
- Q(j);N_GUARD,P_SPINP(i)::S(K),XQ(j)
- S(f);OGATE,P_SPINP(e)::P(E),XS(f)
- S(f);N_GUARD,P_SPINP(e)::P(D)
- S(l);N_GUARD::QAR1(L),XS(l)
- S(l);N_GUARD::QAR1(L)
- S(l);S_CUTQ(j)::S(K)
- P(b);P_SPINP(c)::S(A),XP(b)
- P(e);N_GUARD,P_SPINS(f)::P(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).