MESON Chess Problem Database
Problem Display
PID: 7727 (5b1K/rQp2Ppn/2Bk1B1R/5P2/2R5/3N1n2/8/4q3 w - - 0 1)
Burda, Josef
idee & form, 1993
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qg3
- 2.Qb4#
- 1...Qb4
- 2.Qxb4#
- 1...Qh4
- 2.Qb4#
- 1...Qa1
- 2.Qb4#
- 1...Qc1
- 2.Qb4#
- 1...Qd1
- 2.Qb4#
- 1...Qf1
- 2.Qb4#
- 1...Qh1
- 2.Qb4#
- 1...Qe2
- 2.Qb4#
- 1...Qe4
- 2.Qb4#
- 1...Qe6
- 2.Qb4#
- 1...Qe7
- 2.Be5#
- 2.Qb4#
- 1...Qe8
- 2.Qb4#
- 2.fxe8S#
- 1...Be7
- 2.Be5#
- 1...Sg1
- 2.Rd4#
- 1...Sd2
- 2.Rd4#
- 2.Qb4#
- 1...Sh2
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sh4
- 2.Rd4#
- 1...Se5
- 2.Rd4#
- 1...Sfg5
- 2.Rd4#
- 1...Qg3
- Tries
- 1.Bc3+?
- 1...Qe6
- 2.Bb4#
- 2.Rxe6#
- 2.Qb4#
- 1...Sf6
- 2.Qb4#
- 1...gxh6
- 2.Qb4#
- 1...g6
- 2.Qb4#
- 1...Ke7!
- 1...Qe6
- 1.Bd4+?
- 1...Qe6
- 2.Bc5#
- 2.Rxe6#
- 2.Qb4#
- 1...Sf6
- 2.Bc5#
- 1...gxh6
- 2.Bc5#
- 1...g6
- 2.Bc5#
- 1...Ke7!
- 1...Qe6
- 1.Bc3+?
- Keys
- 1.Qc8!
- threat
- 2.Qd7#
- 2.Qd8#
- 1...Qe6
- 2.Qxe6#
- 1...Qe7
- 2.Be5#
- 1...Qe8
- 2.fxe8S#
- 1...Ra8
- 2.Qd7#
- 1...Be7
- 2.Be5#
- 2.Qd7#
- 1...Se5
- 2.Qe6#
- threat
- 1.Qc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 16
- Sets
- Q(a);N_GUARD::QAB(G)
- Q(a);N_GUARD::QAB(G),XQ(a)
- B(h);SBLOCK::R(F)+B(E),DCHECK
- S(b);N_GUARD::R(B)
- S(b);N_GUARD::R(B),XS(b)
- Tries
- Try
- B(E);CHECK
- Vars
- S(g);P_SPINS(g)::QAB(G)
- P(f);XR(F)::QAB(G)
- P(f);P_SPINP(f)::QAB(G)
- Refutation
- K(c);P_SPINP(e),S_FLIGHT
- Try
- B(E);CHECK
- Vars
- S(g);P_SPINS(g)::B(E)
- P(f);XR(F)::B(E)
- P(f);P_SPINP(f)::B(E)
- Refutation
- K(c);P_SPINP(e),S_FLIGHT
- Try
- Actual
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD::QAR1(G),XQ(a)
- Q(a);SBLOCK::R(F)+B(E),DCHECK
- Q(a);OGATE::PXQ(a)=S
- R(d);::QAR1(G)
- S(b);S_CUTQ(a)::QAR1(G)
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).