MESON Chess Problem Database
Problem Display
PID: 189982 (6nq/1R6/5krn/K1N2pN1/8/p3Q3/1r6/B7 w - - 0 1)
Elkhan, Alexander A
3rd Prize, Szachista Polski, 1913
#2
6 + 8
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qg7
- 2.Rb6#
- 1...Qh7
- 2.Sxh7#
- 1...Rxg5
- 2.Qe6#
- 1...Rg7
- 2.Rb6#
- 1...Sg4
- 2.Rf7#
- 1...Sf7
- 2.Rxf7#
- 1...Se7
- 2.Qxe7#
- 1...a2
- 2.Bxb2#
- 1...Qg7
- Tries
- 1.Ka4?
- 1...Rxg5
- 2.Qe6#
- 1...Rg7
- 2.Rb6#
- 1...Sf7
- 2.Rxf7#
- 1...Se7
- 2.Qxe7#
- 1...Qg7
- 2.Rb6#
- 1...Qh7
- 2.Sxh7#
- 1...Sg4
- 2.Rf7#
- 1...a2
- 2.Bxb2#
- 1...f4!
- 1...Rxg5
- 1.Ka6?
- 1...Rxg5
- 2.Qe6#
- 1...Rg7
- 2.Rb6#
- 1...Sf7
- 2.Rxf7#
- 1...Se7
- 2.Qxe7#
- 1...Qg7
- 2.Rb6#
- 1...Qh7
- 2.Sxh7#
- 1...Sg4
- 2.Rf7#
- 1...a2
- 2.Bxb2#
- 1...f4!
- 1...Rxg5
- 1.Sce4+?
- 1...Ke5
- 2.Rb5#
- 1...fxe4!
- 1...Ke5
- 1.Sf3?
- threat
- 2.Qd4#
- 2.Qc3#
- 2.Qe5#
- 2.Qe6#
- 1...Rg1
- 2.Qe6#
- 1...Rg2
- 2.Qe6#
- 1...Rg3
- 2.Qe6#
- 1...Rg4
- 2.Qe6#
- 1...Rg5
- 2.Qxg5#
- 2.Qe6#
- 1...Rg7
- 2.Qe6#
- 1...Se7
- 2.Qxe7#
- 1...f4
- 2.Qe5#
- 2.Qe6#
- 1...Sg4
- 2.Qe6#
- 1...Sf7!
- threat
- 1.Sh3?
- threat
- 2.Qd4#
- 2.Qc3#
- 2.Qe6#
- 1...Rg1
- 2.Qe6#
- 1...Rg2
- 2.Qe6#
- 1...Rg3
- 2.Qe6#
- 1...Rg4
- 2.Qe6#
- 1...Rg5
- 2.Qe6#
- 1...Rg7
- 2.Qe6#
- 1...Se7
- 2.Qxe7#
- 1...f4
- 2.Qe6#
- 1...Sg4
- 2.Qe6#
- 1...Sf7!
- threat
- 1.Ra7?
- 1...Rxg5
- 2.Qe6#
- 1...Rg7
- 2.Ra6#
- 1...Sf7
- 2.Rxf7#
- 1...Se7
- 2.Qxe7#
- 1...Qg7
- 2.Ra6#
- 1...Qh7
- 2.Sxh7#
- 1...Sg4
- 2.Rf7#
- 1...a2
- 2.Bxb2#
- 1...f4!
- 1...Rxg5
- 1.Rc7?
- 1...Rxg5
- 2.Qe6#
- 1...Rg7
- 2.Rc6#
- 1...Sf7
- 2.Rxf7#
- 1...Se7
- 2.Qxe7#
- 1...Qg7
- 2.Rc6#
- 1...Qh7
- 2.Sxh7#
- 1...Sg4
- 2.Rf7#
- 1...a2
- 2.Bxb2#
- 1...f4!
- 1...Rxg5
- 1.Rd7?
- 1...Rxg5
- 2.Qe6#
- 1...Rg7
- 2.Rd6#
- 1...Sf7
- 2.Rxf7#
- 1...Se7
- 2.Qxe7#
- 1...Qg7
- 2.Rd6#
- 1...Qh7
- 2.Sxh7#
- 1...Sg4
- 2.Rf7#
- 1...a2
- 2.Bxb2#
- 1...f4!
- 1...Rxg5
- 1.Re7?
- threat
- 2.Sd7#
- 1...Rxg5
- 2.Qe6#
- 1...Rg7
- 2.Re6#
- 1...Sf7
- 2.Rxf7#
- 1...f4
- 2.Qe5#
- 1...Sxe7!
- threat
- 1.Ka4?
- Keys
- 1.Sd3!
- 1...Rxg5
- 2.Qb6#
- 1...Rg7
- 2.Rb6#
- 1...Sf7
- 2.Rxf7#
- 1...Se7
- 2.Qxe7#
- 1...f4
- 2.Qe5#
- 1...Qg7
- 2.Rb6#
- 1...Qh7
- 2.Sxh7#
- 1...Sg4
- 2.Rf7#
- 1...a2
- 2.Bxb2#
- 1...Rxg5
- 1.Sd3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(h);SBLOCK::R(F)
- Q(h);N_GUARD::S(E),XQ(h)
- R(e);SBLOCK,XS(E)::QAR1(B)
- R(e);SBLOCK::R(F)
- S(f);N_GUARD::R1(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);N_GUARD::B(A),XR(a)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- R(e);SBLOCK,XS(E)::QAR1(B)
- R(e);SBLOCK::R(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(g);N_GUARD::QAB1(B),XS(g)
- Q(h);SBLOCK::R(F)
- Q(h);N_GUARD::S(E),XQ(h)
- S(f);N_GUARD::R1(F)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- P(c);
- Try
- K(C);P-FLIGHT
- Vars
- R(e);SBLOCK,XS(E)::QAR1(B)
- R(e);SBLOCK::R(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(g);N_GUARD::QAB1(B),XS(g)
- Q(h);SBLOCK::R(F)
- Q(h);N_GUARD::S(E),XQ(h)
- S(f);N_GUARD::R1(F)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- P(c);
- Try
- S(D);CHECK
- Vars
- K(d);N_GUARD,S_CUTP(c),S_FLIGHT::R(F)
- Refutation
- P(c);XS(D)
- Try
- S(E);
- Threat
- DUALS(4)
- Vars
- R(e);::QAR1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- S(f);::QAR1(B)
- Refutation
- S(f);
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- R(e);::QAR1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(c);::QAR1(B)
- S(f);::QAR1(B)
- Refutation
- S(f);
- Try
- R(F);
- Vars
- R(e);SBLOCK,XS(E)::QAR1(B)
- R(e);SBLOCK::R(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(g);N_GUARD::QAB1(B),XS(g)
- Q(h);SBLOCK::R(F)
- Q(h);N_GUARD::S(E),XQ(h)
- S(f);N_GUARD::R1(F)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- P(c);
- Try
- R(F);
- Vars
- R(e);SBLOCK,XS(E)::QAR1(B)
- R(e);SBLOCK::R(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(g);N_GUARD::QAB1(B),XS(g)
- Q(h);SBLOCK::R(F)
- Q(h);N_GUARD::S(E),XQ(h)
- S(f);N_GUARD::R1(F)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- P(c);
- Try
- R(F);
- Vars
- R(e);SBLOCK,XS(E)::QAR1(B)
- R(e);SBLOCK::R(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(g);N_GUARD::QAB1(B),XS(g)
- Q(h);SBLOCK::R(F)
- Q(h);N_GUARD::S(E),XQ(h)
- S(f);N_GUARD::R1(F)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- P(c);
- Try
- R(F);
- Threat
- S(D)
- Vars
- R(e);SBLOCK,XS(E)::QAR1(B)
- R(e);SBLOCK::R1(F)
- S(f);N_GUARD::R1(F),XS(f)
- P(c);::QAB1(B)
- Refutation
- S(g);XR(F)
- Try
- Actual
- S(D);
- Vars
- R(e);SBLOCK,XS(E)::QAR(B)
- R(e);SBLOCK::R(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(c);::QAB1(B)
- Q(h);SBLOCK::R(F)
- Q(h);N_GUARD::S(E),XQ(h)
- S(f);N_GUARD::R1(F)
- P(b);N_GUARD::B(A),XR(a)
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).