MESON Chess Problem Database
Problem Display
PID: 57433 (8/K3R3/p7/2P2B2/2Pk4/2pNN3/6r1/Q7 w - - 0 1)
Haring, Jacobus
Chess Life, 1956
#2
8 + 4
SOLUTION
- SOUND
- Tries
- 1.Qd1?
- threat
- 2.Re4#
- 1...c2
- 2.Qa1#
- 1...Rd2
- 2.Qg4#
- 1...Rg4
- 2.Qxg4#
- 1...Rg7!
- threat
- 1.Qf1?
- threat
- 2.Re4#
- 2.Qf4#
- 1...c2
- 2.Qa1#
- 1...Re2
- 2.Qf4#
- 1...Rf2
- 2.Re4#
- 1...Rg7
- 2.Qf4#
- 1...Rg4!
- threat
- 1.Qh1?
- 1...c2
- 2.Qa1#
- 1...Rg1
- 2.Qe4#
- 2.Qd5#
- 1...Ra2
- 2.Qe4#
- 2.Qd5#
- 2.Qh4#
- 2.Qh8#
- 1...Rb2
- 2.Qe4#
- 2.Qd5#
- 2.Qh4#
- 2.Qh8#
- 1...Rc2
- 2.Qe4#
- 2.Qd5#
- 2.Qh4#
- 2.Qh8#
- 1...Rd2
- 2.Qe4#
- 2.Qd5#
- 2.Qh4#
- 2.Qh8#
- 1...Re2
- 2.Qe4#
- 2.Qd5#
- 2.Qh4#
- 2.Qh8#
- 1...Rf2
- 2.Qe4#
- 2.Qd5#
- 2.Qh8#
- 1...Rh2
- 2.Qe4#
- 2.Qd5#
- 1...Rg3
- 2.Qe4#
- 2.Qd5#
- 1...Rg4
- 2.Qd5#
- 1...Rg5
- 2.Qe4#
- 2.Qd5#
- 1...Rg6
- 2.Qe4#
- 2.Qd5#
- 1...Rg7
- 2.Qe4#
- 2.Qd5#
- 1...Rg8
- 2.Qe4#
- 2.Qd5#
- 1...a5!
- 1...c2
- 1.Qxa6?
- threat
- 2.Qd6#
- 2.Qf6#
- 1...c2
- 2.Qa1#
- 2.Qf6#
- 1...Rg6
- 2.Sc2#
- 1...Ra2!
- threat
- 1.Qd1?
- Keys
- 1.Qa4!
- threat
- 2.Qd7#
- 1...c2
- 2.Qa1#
- 1...Rg6
- 2.Sc2#
- threat
- 1.Qa4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Tries
- Try
- Q(A);N_PINP(b)
- Threat
- R1(H)
- Vars
- P(b);OGATEB::QAB(A)
- R(a);N_GUARD::QAR(A)
- R(a);N_GUARD::QAR(A),XR(a)
- Refutation
- R(a);P_PINR(H)
- Try
- Q(A);N_PINP(b)
- Threat
- DUALS(2)
- Vars
- P(b);OGATEB::QAB(A)
- R(a);::QAR2(A)
- R(a);::R1(H)
- R(a);P_PINR(H)::QAR2(A)
- Refutation
- R(a);
- Try
- Q(A);N_PINP(b)
- Vars
- P(b);OGATEB::QAB(A)
- R(a);OGATE::QAR1(A)
- Refutation
- P(d);
- Try
- Q(A);N_PINP(b),XP(d)
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD::S(C)
- Refutation
- R(a);P_PINQ(A)
- Try
- Actual
- Q(A);N_PINP(b)
- Threat
- QAR(A)
- Vars
- P(b);OGATEB::QAB(A)
- R(a);N_GUARD::S(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).