MESON Chess Problem Database
Problem Display
PID: 17704 (4R2B/Q5nK/6p1/p1Npn3/Rrpk1p2/3N1P2/B1rP4/8 w - - 0 1)
Valve, Leo Erland
2nd Place, Tidens Kravs, 1948
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Sxd3
- 2.Sb3#
- 1...Sf5
- 2.Bxe5#
- 1...Sh5
- 2.Bxe5#
- 1...Se6
- 2.Bxe5#
- 1...Sxe8
- 2.Bxe5#
- 1...cxd3
- 2.Se6#
- 1...Sxd3
- Tries
- 1.Se1?
- threat
- 2.Sxc2#
- 2.Sb3#
- 2.Se6#
- 1...Rxa2
- 2.Sb3#
- 2.Se6#
- 1...Sxf3
- 2.Sxc2#
- 2.Sxf3#
- 2.Sb3#
- 1...Rb6
- 2.Sb3#
- 1...Rc1
- 2.Sb3#
- 2.Se6#
- 1...Rcb2
- 2.Sb3#
- 2.Se6#
- 1...Rc3
- 2.Sb3#
- 2.Se6#
- 1...Rbb2
- 2.Sb3#
- 2.Se6#
- 1...Rb3
- 2.Sxc2#
- 2.Sxb3#
- 2.Se6#
- 1...Sd3
- 2.Sxc2#
- 2.Sb3#
- 1...Sg4
- 2.Sxc2#
- 2.Sb3#
- 1...Sc6
- 2.Sxc2#
- 2.Sb3#
- 1...Sd7
- 2.Sxc2#
- 2.Sb3#
- 1...Sf7
- 2.Sxc2#
- 2.Sb3#
- 1...Se6
- 2.Sxc2#
- 2.Sb3#
- 2.Sxe6#
- 1...c3
- 2.Sxc2#
- 2.Scd3#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Rxd2!
- threat
- 1.Sf2?
- threat
- 2.Sb3#
- 2.Se6#
- 1...Sxf3
- 2.Sb3#
- 1...Rb6
- 2.Sb3#
- 1...Rb3
- 2.Sxb3#
- 2.Se6#
- 1...Sd3
- 2.Sb3#
- 1...Sg4
- 2.Sb3#
- 1...Sc6
- 2.Sb3#
- 1...Sd7
- 2.Sb3#
- 1...Sf7
- 2.Sb3#
- 1...Se6
- 2.Sb3#
- 2.Sxe6#
- 1...c3
- 2.Scd3#
- 2.Sce4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Rxd2!
- threat
- 1.Sxb4?
- threat
- 2.Sxc2#
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Rxa2
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Rxd2
- 2.Se4#
- 1...Sxf3
- 2.Sxc2#
- 2.Sc6#
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Sb7#
- 2.Sd7#
- 1...Rc1
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Rb2
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Rc3
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Sd3
- 2.Sxc2#
- 2.Sc6#
- 2.Sb3#
- 2.Scxd3#
- 1...Sg4
- 2.Sxc2#
- 2.Sc6#
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Sb7#
- 2.Sd7#
- 1...Sc6
- 2.Sxc2#
- 2.Sxc6#
- 2.Sb3#
- 1...Sd7
- 2.Sxc2#
- 2.Sc6#
- 2.Sb3#
- 2.Sxd7#
- 1...Sf7
- 2.Sxc2#
- 2.Sc6#
- 2.Sb3#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Sb7#
- 2.Sd7#
- 1...Se6
- 2.Sxc2#
- 2.Sc6#
- 2.Sb3#
- 2.Sxe6#
- 1...c3
- 2.Sxc2#
- 2.Sc6#
- 2.Scd3#
- 2.Se4#
- 2.Sca6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...axb4!
- threat
- 1.Sxf4?
- threat
- 2.Se2#
- 2.Sb3#
- 2.Sce6#
- 1...Sxf3
- 2.Se2#
- 2.Sb3#
- 1...Rb6
- 2.Sb3#
- 1...Rb3
- 2.Se2#
- 2.Sxb3#
- 2.Sce6#
- 1...Sd3
- 2.Se2#
- 2.Sb3#
- 1...Sg4
- 2.Se2#
- 2.Sb3#
- 1...Sc6
- 2.Se2#
- 2.Sb3#
- 1...Sd7
- 2.Se2#
- 2.Sb3#
- 1...Sf7
- 2.Se2#
- 2.Sb3#
- 1...Se6
- 2.Se2#
- 2.Sfxe6#
- 2.Sb3#
- 2.Scxe6#
- 1...c3
- 2.Se2#
- 2.Scd3#
- 2.Se4#
- 2.Sa6#
- 2.Sce6#
- 2.Sb7#
- 2.Sd7#
- 1...Rxd2!
- threat
- 1.Sxe5?
- threat
- 2.Sb3#
- 2.Sc6#
- 1...Rb6
- 2.Sb3#
- 1...Rb3
- 2.Sxb3#
- 2.Sc6#
- 1...Rxd2!
- threat
- 1.Qxg7?
- threat
- 2.Qxe5#
- 1...cxd3
- 2.Se6#
- 1...Rb7!
- threat
- 1.Se1?
- Keys
- 1.Qc7!
- threat
- 2.Qxe5#
- 1...Sxd3
- 2.Se6#
- 1...Sxf3
- 2.Qxf4#
- 1...cxd3
- 2.Sb3#
- 1...Sg4
- 2.Qxf4#
- 1...Sc6
- 2.Qxf4#
- 1...Sd7
- 2.Qxf4#
- 1...Sf7
- 2.Qxf4#
- threat
- 1.Qc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 4
- Sets
- S(h);P_SPINS(j),SBLOCK,XS(C)::QAB(G)+S(F),DCHECK
- S(j);OGATE,P_SPINS(h)::B(J),XS(h)
- S(j);OGATE,P_SPINS(h),XR(I)::B(J),XS(h)
- P(c);P_SPINR(b),SBLOCK,XS(C)::QAB(G)+S(F),DCHECK
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- R(b);P_SPINP(c)::S(F)
- Refutation
- R(a);XP(B)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- S(h);P_SPINS(j),XP(D)::QAB(G)+S(F),DCHECK
- R(b);P_SPINP(c)::S(F)
- S(h);P_SPINS(j)::QAB(G)+S(F),DCHECK
- Refutation
- R(a);XP(B)
- Try
- S(C);XR(b)
- Threat
- DUALS(8)
- Vars
- R(a);XP(B)::QAB(G)+S(F)
- Refutation
- P(f);XS(C)
- Try
- S(C);XP(e)
- Threat
- DUALS(3)
- Vars
- R(b);P_SPINP(c)::S(F)
- Refutation
- R(a);XP(B)
- Try
- S(C);XS(h)
- Threat
- DUALS(2)
- Vars
- R(b);P_SPINP(c)::S(F)
- Refutation
- R(a);XP(B)
- Try
- Q(G);P_PINS(h),XS(j)
- Threat
- QAB1(G),XS(h)
- Vars
- P(c);P_SPINR(b),SBLOCK,XS(C)::S(F)
- Refutation
- R(b);P_PINQ(G),P_SPINP(c)
- Try
- Actual
- Q(G);
- Threat
- QAB1(G),XS(h)
- Vars
- S(h);P_SPINS(j),SBLOCK,XS(C)::S(F)
- S(h);OGATE,P_SPINS(j),XP(D)::QAR2(G),XP(e)
- P(c);N_GUARD,P_SPINR(b),SBLOCK,XS(C)::S(F)
- S(h);OGATE,P_SPINS(j)::QAR2(G),XP(e)
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).