MESON Chess Problem Database
Problem Display
PID: 141659 (n1QK1n2/rp2Br2/1p2Rp2/2PkNP2/1p3p2/1Pp5/b1B1N3/2b4q w - - 0 1)
Shire, David J
3rd Prize, StrateGems, 2011
#2
10 + 14
| 23 | Die Schwalbe | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Qxb7#
- 1...Ra4
- 2.Qxb7#
- 1...Ra5
- 2.Qxb7#
- 1...Ra6
- 2.Qxb7#
- 1...Sxe6+
- 2.Qxe6#
- 1...Sg6
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...Sh7
- 2.Qd7#
- 1...bxc5
- 2.Qxc5#
- 1...fxe5
- 2.Rd6#
- 1...Ra3
- Tries
- 1.Sf3?
- threat
- 2.Be4#
- 2.Rd6#
- 1...Sxe6+
- 2.Qxe6#
- 1...Bxb3
- 2.Bxb3#
- 1...Bb1
- 2.Rd6#
- 1...Sc7
- 2.Be4#
- 1...Qxf3!
- threat
- 1.Sc4?
- threat
- 2.Rd6#
- 1...Sxe6+
- 2.Qxe6#
- 1...Sc7
- 2.Sxb6#
- 1...Bxb3!
- threat
- 1.Sg4?
- threat
- 2.Rd6#
- 1...Sxe6+
- 2.Qxe6#
- 1...Bxb3
- 2.Bxb3#
- 1...Sc7!
- threat
- 1.Sc6?
- threat
- 2.Sxb4#
- 1...Sxe6+
- 2.Qxe6#
- 1...Bxb3
- 2.Bxb3#
- 1...bxc5
- 2.Rd6#
- 1...bxc6
- 2.Qxc6#
- 1...Qe4
- 2.Bxe4#
- 1...Ba3
- 2.Sxf4#
- 1...Ra4!
- threat
- 1.Sg6?
- threat
- 2.Rd6#
- 1...Sxe6+
- 2.Qxe6#
- 1...Bxb3
- 2.Bxb3#
- 1...Sxg6
- 2.Qd7#
- 1...Sc7!
- threat
- 1.Sd7?
- threat
- 2.Rd6#
- 1...Bxb3
- 2.Bxb3#
- 1...Sxd7
- 2.Qxd7#
- 1...Sxe6+!
- threat
- 1.Sxf7?
- threat
- 2.Rd6#
- 1...Sxe6+
- 2.Qxe6#
- 1...Bxb3
- 2.Bxb3#
- 1...Sc7!
- threat
- 1.cxb6?
- threat
- 2.Qc4#
- 2.Qc5#
- 1...Sxe6+
- 2.Qxe6#
- 1...Rxe7
- 2.Qc4#
- 1...Bxb3
- 2.Qc5#
- 1...Sxb6
- 2.Qc5#
- 1...Qe4
- 2.Qc5#
- 1...Qg1
- 2.Qc4#
- 1...Ra5
- 2.Qxb7#
- 2.Qc4#
- 1...Be3
- 2.Qc4#
- 1...Sd7
- 2.Qxd7#
- 2.Qc4#
- 1...Sc7!
- threat
- 1.Sf3?
- Keys
- 1.Sd3!
- threat
- 2.Sxb4#
- 1...Sxe6+
- 2.Qxe6#
- 1...Bxb3
- 2.Bxb3#
- 1...bxc5
- 2.Qxc5#
- 1...Qe4
- 2.Rd6#
- 1...Ra4
- 2.Qxb7#
- 1...Ba3
- 2.Sdxf4#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(j);N_GUARD::QAB(I),XP(k)
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- S(n);N_GUARD::QAR2(I)
- S(n);N_GUARD::QAR2(I),XS(n)
- P(h);OGATE,XP(D)::QAR1(I),XP(h)
- P(i);SBLOCK,XS(E)::R1(G)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- B(c);OGATE,XP(C)::B(A),XB(c)
- B(c);::R1(G)
- S(m);::B(A)
- Refutation
- Q(b);XS(E)
- Try
- S(E);
- Threat
- R1(G)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- S(m);N_GUARD::S(E),XP(h)
- Refutation
- B(c);XP(C)
- Try
- S(E);
- Threat
- R1(G)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- B(c);OGATE,XP(C)::B(A),XB(c)
- Refutation
- S(m);
- Try
- S(E);
- Threat
- S(E),XP(e)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- B(c);OGATE,XP(C)::B(A),XB(c)
- P(h);SBLOCK,XP(D)::R1(G)
- P(k);OGATE,XS(E)::QAB1(I),XP(k)
- Q(b);N_GUARD::B(A),XQ(b)
- B(a);N_GUARD::S(B),XP(f)
- Refutation
- R(j);
- Try
- S(E);
- Threat
- R1(G)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- B(c);OGATE,XP(C)::B(A),XB(c)
- S(n);N_GUARD,XS(E)::QAR2(I)
- Refutation
- S(m);
- Try
- S(E);
- Threat
- R1(G)
- Vars
- B(c);OGATE,XP(C)::B(A),XB(c)
- S(n);OGATE,XS(E)::QAR2(I),XS(n)
- Refutation
- S(n);CHECK,XR(G)
- Try
- S(E);XR(l)
- Threat
- R1(G)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- B(c);OGATE,XP(C)::B(A),XB(c)
- Refutation
- S(m);
- Try
- P(D);XP(h)
- Threat
- DUALS(2)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- R(l);XB(H)::QAB1(I)
- B(c);XP(C)::QAR1(I)
- S(m);XP(D)::QAR1(I)
- Q(b);::QAR1(I)
- Q(b);::QAB1(I)
- B(a);::QAB1(I)
- Refutation
- S(m);
- Try
- Actual
- S(E);
- Threat
- S(E),XP(e)
- Vars
- S(n);CHECK,OGATE,XR(G)::QAB1(I),XS(n)
- B(c);OGATE,XP(C)::B(A),XB(c)
- P(h);OGATE,XP(D)::QAR1(I),XP(h)
- Q(b);SBLOCK::R1(G)
- R(j);N_GUARD::QAB(I),XP(k)
- B(a);N_GUARD::S(E),XP(f)
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).