MESON Chess Problem Database
Problem Display
PID: 90970 (5r2/1p6/2p1P3/2R2P2/p2kN1NQ/2R2p2/1n3r2/KB4b1 w - - 0 1)
Lider, Valentin Viktorovich
Die Schwalbe, 1964
#2
9 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rf6
- 2.Qxf6#
- 1...Ra8
- 2.Qf6#
- 1...Rb8
- 2.Qf6#
- 1...Rc8
- 2.Qf6#
- 1...Rd8
- 2.Qf6#
- 2.Qxd8#
- 1...Re8
- 2.Qf6#
- 1...Rg8
- 2.Qf6#
- 1...Rh8
- 2.Qf6#
- 2.Qxh8#
- 1...Bh2
- 2.Qxf2#
- 1...Sd1
- 2.R3c4#
- 1...Sd3
- 2.R3c4#
- 1...Sc4
- 2.R3xc4#
- 1...Rf6
- Tries
- 1.Sd2?
- threat
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rxd2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Sc4
- 2.R3xc4#
- 1...Rf1
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Re2
- 2.Sxf3#
- 2.Se3#
- 1...Rg2
- 2.Sxf3#
- 1...Rh2
- 2.Sxf3#
- 2.Sxh2#
- 1...Rf6
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sxf6#
- 2.Sh6#
- 2.Qxf6#
- 1...Rg8
- 2.Qf6#
- 1...Rh8
- 2.Sh6#
- 2.Qf6#
- 2.Qxh8#
- 1...Bh2
- 2.Sxh2#
- 2.Qxf2#
- 1...Sd3
- 2.R3c4#
- 1...Rxf5!
- threat
- 1.Sexf2?
- threat
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Bxf2
- 2.Sxf2#
- 2.Qxf2#
- 1...Sc4
- 2.R3xc4#
- 1...Rf6
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sxf6#
- 2.Sh6#
- 2.Qxf6#
- 1...Rg8
- 2.Qf6#
- 1...Rh8
- 2.Sh6#
- 2.Qf6#
- 2.Qxh8#
- 1...Bh2
- 2.Sxh2#
- 1...Sd3
- 2.R3c4#
- 1...Rxf5!
- threat
- 1.Sg5?
- threat
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Sc4
- 2.R3xc4#
- 1...Rf1
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rc2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rd2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 2.Sxf3#
- 1...Re2
- 2.Se3#
- 2.Sxf3#
- 1...Rg2
- 2.Sxf3#
- 1...Rh2
- 2.Sxh2#
- 2.Sxf3#
- 1...Rf6
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sxf6#
- 2.Sh6#
- 1...Rh8
- 2.Sh6#
- 2.Qxh8#
- 1...Bh2
- 2.Sxh2#
- 2.Qxf2#
- 1...Sd3
- 2.R3c4#
- 1...Rxf5!
- threat
- 1.Sd6?
- threat
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rxf5
- 2.Sxf5#
- 1...Sc4
- 2.R3xc4#
- 1...Rf1
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rc2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rd2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Re2
- 2.Se3#
- 1...Rh2
- 2.Sxh2#
- 1...Rf6
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sxf6#
- 2.Sh6#
- 2.Qxf6#
- 1...Rg8
- 2.Qf6#
- 1...Rh8
- 2.Sh6#
- 2.Qf6#
- 2.Qxh8#
- 1...Bh2
- 2.Sxh2#
- 2.Qxf2#
- 1...Sd3
- 2.R3c4#
- 1...Rg2!
- threat
- 1.Sgxf2?
- threat
- 2.Sd2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Bxf2
- 2.Sxf2#
- 2.Sg3#
- 2.Qxf2#
- 1...Sd3
- 2.Rxd3#
- 1...Rf6
- 2.Sd2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sxf6#
- 2.Qxf6#
- 1...Rg8
- 2.Sg5#
- 2.Qf6#
- 1...Rh8
- 2.Qf6#
- 2.Qxh8#
- 1...Bh2
- 2.Sg3#
- 1...Sc4
- 2.Rd3#
- 1...Rxf5!
- threat
- 1.Se3?
- threat
- 2.Sd2#
- 2.Sxf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Rxf5
- 2.Sxf5#
- 1...Sd3
- 2.Rxd3#
- 1...Rg2
- 2.Sg3#
- 1...Rf1
- 2.Sc2#
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Rc2
- 2.Sxc2#
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Rd2
- 2.Sxd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Re2
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Rf6
- 2.Sd2#
- 2.Sxf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sxf6#
- 2.Qxf6#
- 1...Rg8
- 2.Sg5#
- 2.Qf6#
- 1...Rh8
- 2.Qf6#
- 2.Qxh8#
- 1...Bh2
- 2.Sg3#
- 1...Sc4
- 2.Rd3#
- 1...Rh2!
- threat
- 1.Se5?
- threat
- 2.Sd2#
- 2.Sxf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Rxf5
- 2.Qd8#
- 1...Sd3
- 2.Rxd3#
- 1...Rg2
- 2.Sg3#
- 2.Sxf3#
- 1...Rf1
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Rc2
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 2.Sxf3#
- 1...Rd2
- 2.Sxd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 2.Sxf3#
- 1...Re2
- 2.Sxf3#
- 1...Rh2
- 2.Sxf3#
- 1...Rf6
- 2.Sd2#
- 2.Sxf2#
- 2.Sg3#
- 2.Sg5#
- 2.Sd6#
- 2.Sxf6#
- 1...Rg8
- 2.Sg5#
- 1...Bh2
- 2.Sg3#
- 2.Qxf2#
- 1...Sc4
- 2.Rd3#
- 1...Rh8!
- threat
- 1.Rd3+?
- 1...Kxe4
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Sf6#
- 2.Sh6#
- 1...Sxd3!
- 1...Kxe4
- 1.Qg3?
- threat
- 2.Qe5#
- 2.Qd6#
- 1...Rc2
- 2.Qe5#
- 1...Sd3
- 2.R3c4#
- 1...Rd8
- 2.Qe5#
- 1...Bh2
- 2.Qxf2#
- 1...Sc4
- 2.R3xc4#
- 1...Rxf5!
- threat
- 1.Qh8+?
- 1...Rf6
- 2.Qxf6#
- 2.Qd8#
- 1...Rxh8!
- 1...Rf6
- 1.Sd2?
- Keys
- 1.Sg3!
- threat
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rxf5
- 2.Sxf5#
- 1...Sc4
- 2.R3xc4#
- 1...Rf1
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rc2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rd2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Re2
- 2.Se3#
- 1...Rg2
- 2.Sf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Rh2
- 2.Sxh2#
- 1...Rf6
- 2.Sxf2#
- 2.Sh2#
- 2.Se3#
- 2.Se5#
- 2.Sxf6#
- 2.Sh6#
- 2.Qxf6#
- 1...Rg8
- 2.Qf6#
- 1...Rh8
- 2.Sh6#
- 2.Qf6#
- 2.Qxh8#
- 1...Bh2
- 2.Sxf2#
- 2.Sxh2#
- 2.Se3#
- 2.Se5#
- 2.Sf6#
- 2.Sh6#
- 1...Sd3
- 2.R3c4#
- threat
- 1.Sg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(i);N_GUARD::QAB(F),XR(i)
- R(i);N_GUARD::QAB(F)
- B(a);N_GUARD::QAB(F),XR(c)
- S(b);N_GUARD::R1(C)
- S(b);N_GUARD::R1(C),XS(b)
- Tries
- Try
- S(D);
- Threat
- DUALS(6)
- Vars
- S(b);N_GUARD::R1(C),XS(b)
- R(c);N_GUARD::S(D),XP(d)
- R(i);N_GUARD::QAB(F)
- S(b);N_GUARD::R1(C)
- Refutation
- R(i);XP(H)
- Try
- S(D);XR(c)
- Threat
- DUALS(5)
- Vars
- S(b);N_GUARD::R1(C),XS(b)
- R(i);N_GUARD::QAB(F)
- B(a);::QAR(F)+S(E),XB(a)
- S(b);N_GUARD::R1(C)
- Refutation
- R(i);XP(H)
- Try
- S(D);
- Threat
- DUALS(6)
- Vars
- S(b);N_GUARD::R1(C),XS(b)
- R(c);N_GUARD::S(D),XP(d)
- S(b);N_GUARD::R1(C)
- Refutation
- R(i);XP(H)
- Try
- S(D);
- Threat
- DUALS(6)
- Vars
- R(i);XP(H)::S(D),XR(i)
- S(b);N_GUARD::R1(C),XS(b)
- R(c);::QAR(F)+S(E)
- R(c);::QAR(F)+S(E),XR(c)
- R(i);N_GUARD::QAB(F)
- S(b);N_GUARD::R1(C)
- Refutation
- R(c);
- Try
- S(E);XR(c)
- Threat
- DUALS(5)
- Vars
- S(b);N_GUARD::R1(C),XS(b)
- B(a);::QAR(F)+S(D)
- S(b);N_GUARD::R1(C)
- Refutation
- R(i);XP(H)
- Try
- S(E);
- Threat
- DUALS(6)
- Vars
- R(i);XP(H)::S(E),XR(i)
- S(b);N_GUARD::R1(C),XS(b)
- R(c);::QAR(F)+S(D)
- B(a);::QAR(F)+S(D)
- S(b);N_GUARD::R1(C)
- Refutation
- R(c);
- Try
- S(E);
- Threat
- DUALS(6)
- Vars
- R(i);N_GUARD,XP(H)::QAR(F)
- S(b);N_GUARD::R1(C),XS(b)
- R(c);N_GUARD::S(E),XP(d)
- R(i);::QAR(F)+S(D)
- S(b);N_GUARD::R1(C)
- Refutation
- R(i);
- Try
- R(C);CHECK
- Refutation
- S(b);XR(C)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- R(c);::QAB1(F)
- S(b);N_GUARD::R1(C)
- R(i);::QAB1(F)
- B(a);N_GUARD::QAB(F),XR(c)
- S(b);N_GUARD::R1(C),XS(b)
- Refutation
- R(i);XP(H)
- Try
- Q(F);CHECK
- Refutation
- R(i);XQ(F)
- Try
- Actual
- S(D);
- Threat
- DUALS(6)
- Vars
- R(i);XP(H)::S(D),XR(i)
- S(b);N_GUARD::R1(C),XS(b)
- R(c);::QAR(F)+S(E)
- R(c);::QAR(F)+S(E),XR(c)
- R(i);N_GUARD::QAB(F)
- S(b);N_GUARD::R1(C)
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).