MESON Chess Problem Database
Problem Display
PID: 247215 (r7/3p2RP/3B4/2p5/1bK5/1QpP4/2P1NP2/r6k w - - 0 1)
Lipton, Michael
The Problemist, 1954
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Qxb1#
- 1...Rg1
- 2.Rxg1#
- 1...R1a2
- 2.Rg1#
- 2.Qb1#
- 1...R1a3
- 2.Rg1#
- 2.Qb1#
- 1...R1a4
- 2.Rg1#
- 2.Qb1#
- 1...R1a5
- 2.Rg1#
- 2.Qb1#
- 1...R1a6
- 2.Rg1#
- 2.Qb1#
- 1...R1a7
- 2.Rg1#
- 2.Qb1#
- 1...R8a2
- 2.h8Q#
- 2.h8R#
- 1...R8a3
- 2.h8Q#
- 2.h8R#
- 1...R8a4
- 2.h8Q#
- 2.h8R#
- 1...R8a5
- 2.h8Q#
- 2.h8R#
- 1...R8a6
- 2.h8Q#
- 2.h8R#
- 1...R8a7
- 2.h8Q#
- 2.h8R#
- 1...Ba3
- 2.Qb7#
- 1...Ba5
- 2.Qb7#
- 1...Rb1
- Tries
- 1.Rg8?
- threat
- 2.h8Q#
- 2.h8R#
- 1...Rc1
- 2.h8Q#
- 2.h8R#
- 1...Rb1
- 2.Qxb1#
- 2.h8Q#
- 2.h8R#
- 1...Rd1
- 2.h8Q#
- 2.h8R#
- 1...Re1
- 2.h8Q#
- 2.h8R#
- 1...Rf1
- 2.h8Q#
- 2.h8R#
- 1...Rg1
- 2.Rxg1#
- 2.h8Q#
- 2.h8R#
- 1...R1a2
- 2.Rg1#
- 2.Qb1#
- 2.h8Q#
- 2.h8R#
- 1...R1a3
- 2.Rg1#
- 2.Qb1#
- 2.h8Q#
- 2.h8R#
- 1...R1a4
- 2.Rg1#
- 2.Qb1#
- 2.h8Q#
- 2.h8R#
- 1...R1a5
- 2.Rg1#
- 2.Qb1#
- 2.h8Q#
- 2.h8R#
- 1...R1a6
- 2.Rg1#
- 2.Qb1#
- 2.h8Q#
- 2.h8R#
- 1...R1a7
- 2.Rg1#
- 2.Qb1#
- 2.h8Q#
- 2.h8R#
- 1...R8a2
- 2.h8Q#
- 2.h8R#
- 1...R8a3
- 2.h8Q#
- 2.h8R#
- 1...R8a4
- 2.h8Q#
- 2.h8R#
- 1...R8a5
- 2.h8Q#
- 2.h8R#
- 1...R8a6
- 2.h8Q#
- 2.h8R#
- 1...R8a7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.h8Q#
- 2.h8R#
- 1...Rc8
- 2.h8Q#
- 2.h8R#
- 1...Rd8
- 2.h8Q#
- 2.h8R#
- 1...Re8
- 2.h8Q#
- 2.h8R#
- 1...Rf8
- 2.h8Q#
- 2.h8R#
- 1...Ba3
- 2.Qb7#
- 2.h8Q#
- 2.h8R#
- 1...Ba5
- 2.Qb7#
- 2.h8Q#
- 2.h8R#
- 1...Rxg8!
- threat
- 1.Qa2?
- 1...R1xa2
- 2.Rg1#
- 1...R8xa2
- 2.h8Q#
- 2.h8R#
- 1...Rc1
- 2.Qxa8#
- 1...Rb1
- 2.Qxb1#
- 2.Qxa8#
- 1...Rd1
- 2.Qxa8#
- 1...Re1
- 2.Qxa8#
- 1...Rf1
- 2.Qxa8#
- 1...Rg1
- 2.Rxg1#
- 1...Ra3
- 2.h8Q#
- 2.h8R#
- 1...Ra4
- 2.h8Q#
- 2.h8R#
- 1...Ra5
- 2.h8Q#
- 2.h8R#
- 1...Ra6
- 2.h8Q#
- 2.h8R#
- 1...Ra7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.Qxa1#
- 1...Rc8
- 2.Qxa1#
- 1...Rd8
- 2.Qxa1#
- 1...Re8
- 2.Qxa1#
- 1...Rf8
- 2.Qxa1#
- 1...Rg8
- 2.Qxa1#
- 1...Rh8
- 2.Qxa1#
- 1...Ba5
- 2.Qxa1#
- 1...Ba3!
- 1...R1xa2
- 1.Qa3?
- 1...R1xa3
- 2.Rg1#
- 1...R8xa3
- 2.h8Q#
- 2.h8R#
- 1...Rc1
- 2.Qxc1#
- 2.Qxa8#
- 1...Rb1
- 2.Qxa8#
- 1...Rd1
- 2.Qxa8#
- 1...Re1
- 2.Qxa8#
- 1...Rf1
- 2.Qxa8#
- 1...Rg1
- 2.Rxg1#
- 1...Ra2
- 2.Rg1#
- 2.Qc1#
- 1...Ra4
- 2.h8Q#
- 2.h8R#
- 1...Ra5
- 2.h8Q#
- 2.h8R#
- 1...Ra6
- 2.h8Q#
- 2.h8R#
- 1...Ra7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.Qxa1#
- 1...Rc8
- 2.Qxa1#
- 1...Rd8
- 2.Qxa1#
- 1...Re8
- 2.Qxa1#
- 1...Rf8
- 2.Qxa1#
- 1...Rg8
- 2.Qxa1#
- 1...Rh8
- 2.Qxa1#
- 1...Ba5
- 2.Qxa1#
- 1...Bxa3!
- 1...R1xa3
- 1.Rg8?
- Keys
- 1.Qa4!
- 1...R1xa4
- 2.Rg1#
- 1...R8xa4
- 2.h8Q#
- 2.h8R#
- 1...Rc1
- 2.Qxa8#
- 1...Rb1
- 2.Qxa8#
- 1...Rd1
- 2.Qxa8#
- 1...Re1
- 2.Qxa8#
- 1...Rf1
- 2.Qxa8#
- 1...Rg1
- 2.Rxg1#
- 1...Ra2
- 2.Rg1#
- 1...Ra3
- 2.Rg1#
- 1...Ra5
- 2.h8Q#
- 2.h8R#
- 1...Ra6
- 2.h8Q#
- 2.h8R#
- 1...Ra7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.Qxa1#
- 1...Rc8
- 2.Qxa1#
- 1...Rd8
- 2.Qxa1#
- 1...Re8
- 2.Qxa1#
- 1...Rf8
- 2.Qxa1#
- 1...Rg8
- 2.Qxa1#
- 1...Rh8
- 2.Qxa1#
- 1...Ba3
- 2.Qxa8#
- 1...Ba5
- 2.Qxa1#
- 1...R1xa4
- 1.Qa4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 3
- ADDED MATES = 14
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::QAR(D),XR(a)
- R(a);N_GUARD::R1(H),XR(a)
- R(g);N_GUARD::P=Q
- B(d);OGATE,SBLOCK::QAB(D)
- B(d);OGATE::QAB(D)
- Tries
- Try
- R(H);
- Threat
- P=Q
- Vars
- R(a);::P=Q
- R(g);::P=Q
- Refutation
- R(g);XR(H)
- Try
- Q(D);
- Vars
- R(a);N_GUARD,SBLOCK,XQ(D)::R1(H)
- R(g);N_GUARD,SBLOCK,XQ(D)::P=Q
- R(a);N_GUARD::QAB(D),XR(g)
- R(a);N_GUARD::R1(H),XR(a)
- R(g);N_GUARD::P=Q
- R(g);N_GUARD::QAB1(D),XR(a)
- B(d);S_CUTR(g)::QAB1(D),XR(a)
- Refutation
- B(d);
- Try
- Q(D);
- Vars
- R(a);N_GUARD,SBLOCK,XQ(D)::R1(H)
- R(g);N_GUARD,SBLOCK,XQ(D)::P=Q
- R(a);N_GUARD::QAB(D),XR(g)
- R(a);N_GUARD::R1(H),XR(a)
- R(g);N_GUARD::P=Q
- R(g);N_GUARD::QAB1(D),XR(a)
- B(d);S_CUTR(g)::QAB1(D),XR(a)
- Refutation
- B(d);XQ(D)
- Try
- Actual
- Q(D);
- Vars
- R(a);N_GUARD,XQ(D)::R1(H)
- R(g);N_GUARD,XQ(D)::P=Q
- R(a);N_GUARD::QAB(D),XR(g)
- R(a);N_GUARD::R1(H),XR(a)
- R(a);N_GUARD::R1(H)
- R(g);N_GUARD::P=Q
- R(g);N_GUARD::QAB1(D),XR(a)
- B(d);S_CUTR(a)::QAB(D),XR(g)
- B(d);S_CUTR(g)::QAB1(D),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).