MESON Chess Problem Database
Problem Display
PID: 134788 (4rq1N/5p2/2p3p1/4k1P1/2QR1R2/2P3K1/8/2n5 w - - 0 1)
Hirschenson, Aaron
The Problemist Supplement, 2009
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Sxf7#
- 1...Qb4
- 2.Sxf7#
- 1...Qc5
- 2.Sxf7#
- 1...Qd6
- 2.Sxf7#
- 2.Rde4#
- 1...Qh6
- 2.Sxf7#
- 1...Sa2
- 2.Qe2#
- 1...Se2+
- 2.Qxe2#
- 1...Sb3
- 2.Qe2#
- 1...c5
- 2.Qd5#
- 1...f5
- 2.Sxg6#
- 1...f6
- 2.Sxg6#
- 1...Qa3
- Tries
- 1.Rd1?
- threat
- 2.Qe4#
- 1...Se2+
- 2.Qxe2#
- 1...Qb4
- 2.Sxf7#
- 1...f5
- 2.Sxg6#
- 1...Sd3!
- threat
- 1.Rd2?
- threat
- 2.Qe4#
- 1...Se2+
- 2.Qxe2#
- 1...Qb4
- 2.Sxf7#
- 1...f5
- 2.Sxg6#
- 1...Sd3!
- threat
- 1.Rd5+?
- 1...Ke6
- 2.Re4#
- 2.Qe4#
- 1...cxd5!
- 1...Ke6
- 1.Rd8?
- threat
- 2.Qe4#
- 1...Se2+
- 2.Qxe2#
- 1...Qb4
- 2.Sxf7#
- 1...f5
- 2.Sxg6#
- 1...Rxd8!
- threat
- 1.Rf6?
- threat
- 2.Re4#
- 1...Se2+
- 2.Qxe2#
- 1...Re6!
- threat
- 1.Qf1?
- threat
- 2.Rfe4#
- 1...Se2+
- 2.Qxe2#
- 1...Ke6
- 2.Rfe4#
- 1...f5!
- threat
- 1.Qd3?
- threat
- 2.Rde4#
- 2.Qe4#
- 2.Qe3#
- 1...Se2+
- 2.Qxe2#
- 1...Ke6
- 2.Rde4#
- 2.Qe4#
- 2.Qe3#
- 1...Qb4
- 2.Qe4#
- 2.Qe3#
- 1...f5
- 2.Qe3#
- 1...Sxd3!
- threat
- 1.Qc5+?
- 1...Ke6
- 2.Rfe4#
- 2.Rf6#
- 1...Qxc5!
- 1...Ke6
- 1.Qxc6?
- threat
- 2.Rde4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qf6#
- 1...Qxh8
- 2.Rde4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qd6#
- 1...Qd6
- 2.Rde4#
- 2.Qe4#
- 2.Qxd6#
- 1...Qe7
- 2.Rde4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 1...Qb4
- 2.Sxf7#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qf6#
- 1...Qc5
- 2.Sxf7#
- 2.Rde4#
- 2.Qe4#
- 2.Qf6#
- 1...Qg7
- 2.Rde4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 2.Qxe8#
- 2.Qd6#
- 1...Re6
- 2.Rde4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 1...Rd8
- 2.Rde4#
- 2.Qe4#
- 2.Qf6#
- 1...f5
- 2.Sxg6#
- 2.Rd5#
- 2.Qd5#
- 1...f6
- 2.Sxg6#
- 2.Rde4#
- 2.Rd5#
- 2.Qe4#
- 2.Qd5#
- 1...Se2+!
- threat
- 1.Rd1?
- Keys
- 1.Rd7!
- threat
- 2.Qe4#
- 1...Se2+
- 2.Qxe2#
- 1...Qb4
- 2.Sxf7#
- 1...f5
- 2.Sxg6#
- threat
- 1.Rd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- Q(g);N_GUARD,P_PINP(A)::S(G),XP(e)
- Q(g);N_GUARD::S(G),XP(e)
- S(a);N_GUARD::QAR(C)
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- P(c);N_GUARD::QAR1(C)
- P(e);N_GUARD::S(G),XP(d)
- Tries
- Try
- R(D);
- Threat
- QAR1(C)
- Vars
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- Q(g);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::S(G),XP(d)
- Refutation
- S(a);
- Try
- R(D);
- Threat
- QAR1(C)
- Vars
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- Q(g);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::S(G),XP(d)
- Refutation
- S(a);
- Try
- R(D);CHECK
- Refutation
- P(c);XR(D)
- Try
- R(D);
- Threat
- QAR1(C)
- Vars
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- Q(g);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::S(G),XP(d)
- Refutation
- R(f);XR(D)
- Try
- R(E);
- Threat
- R1(D)
- Vars
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- Refutation
- R(f);
- Try
- Q(C);
- Threat
- R1(E)
- Vars
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- K(b);P-FLIGHT::R(E)
- Refutation
- P(e);
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- P(e);::QAR2(C)
- Refutation
- S(a);XQ(C)
- Try
- Q(C);CHECK
- Refutation
- Q(g);XQ(C)
- Try
- Q(C);XP(c)
- Threat
- DUALS(5)
- Refutation
- S(a);CHECK
- Try
- Actual
- R(D);
- Threat
- QAR1(C)
- Vars
- S(a);CHECK,N_GUARD::QAR(C),XS(a)
- Q(g);N_GUARD::S(G),XP(e)
- P(e);N_GUARD::S(G),XP(d)
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).