MESON Chess Problem Database
Problem Display
PID: 87579 (1nN5/5P1B/3RPN2/r3k2q/p3PppB/2P5/4Q3/3KnR2 w - - 0 1)
Knuppert, Hugo
The Problemist, 1983
#2
12 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxf7
- 2.Sxg4#
- 1...Qf5
- 2.exf5#
- 1...Qh6
- 2.Sxg4#
- 1...Qxh7
- 2.Sxg4#
- 1...Rb5
- 2.Qxb5#
- 1...Rd5+
- 2.exd5#
- 1...Ra6
- 2.Qb5#
- 1...Ra7
- 2.Qb5#
- 1...Ra8
- 2.Qb5#
- 1...Sa6
- 2.Sd7#
- 1...Sc6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...g3
- 2.Qxh5#
- 1...Qxf7
- Tries
- 1.Sxh5?
- threat
- 2.Bf6#
- 1...Rd5+
- 2.exd5#
- 1...Sd7!
- threat
- 1.Rd5+?
- 1...Rxd5+
- 2.exd5#
- 1...Kxe6!
- 1...Rxd5+
- 1.Qxg4?
- threat
- 2.Qxh5#
- 1...Qxg4+
- 2.Sxg4#
- 1...Rd5+
- 2.Rxd5#
- 1...Qxf7
- 2.Qf5#
- 2.Qxf4#
- 2.Qg5#
- 1...Qxh4
- 2.Qf5#
- 1...Qxh7
- 2.Qxf4#
- 1...Qg5
- 2.Qxg5#
- 1...Qg6
- 2.Qxf4#
- 1...Qf5
- 2.Qxf5#
- 1...Qh6
- 2.Qf5#
- 1...f3
- 2.Qg3#
- 1...Sf3!
- threat
- 1.Sxh5?
- Keys
- 1.e7!
- threat
- 2.e8Q#
- 2.e8R#
- 1...Rd5+
- 2.exd5#
- 1...Qxf7
- 2.Sxg4#
- 1...Qxh4
- 2.e8Q#
- 2.e8R#
- 1...Qxh7
- 2.Sxg4#
- 2.e8Q#
- 2.e8R#
- 1...f3
- 2.Bg3#
- 1...Qg6
- 2.e8Q#
- 2.e8R#
- 1...Qf5
- 2.exf5#
- 1...Qg5
- 2.e8Q#
- 2.e8R#
- 1...Qh6
- 2.Sxg4#
- 2.e8Q#
- 2.e8R#
- 1...Rb5
- 2.Qxb5#
- 2.e8Q#
- 2.e8R#
- 1...Rc5
- 2.e8Q#
- 2.e8R#
- 1...Ra6
- 2.Qb5#
- 2.e8Q#
- 2.e8R#
- 1...Ra7
- 2.Qb5#
- 1...Ra8
- 2.Qb5#
- 2.e8Q#
- 2.e8R#
- 1...Sc2
- 2.e8Q#
- 2.e8R#
- 1...Sg2
- 2.e8Q#
- 2.e8R#
- 1...Sd3
- 2.e8Q#
- 2.e8R#
- 1...Sf3
- 2.e8Q#
- 2.e8R#
- 1...Sa6
- 2.Sd7#
- 2.e8Q#
- 2.e8R#
- 1...Sc6
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 2.e8Q#
- 2.e8R#
- 1...a3
- 2.e8Q#
- 2.e8R#
- 1...g3
- 2.Qxh5#
- 2.e8Q#
- 2.e8R#
- threat
- 1.e7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- Q(g);N_GUARD,XP(J)::S(I),XP(d)
- Q(g);OGATE::QAR(C)+P(E),XQ(g)
- Q(g);N_GUARD::S(I),XP(d)
- Q(g);N_GUARD,XB(K)::S(I),XP(d)
- R(e);N_GUARD::QAR(C),XR(e)
- R(e);CHECK,OGATE::QAR(C)+P(E),XR(e)
- R(e);N_GUARD::QAR(C)
- S(h);N_GUARD::S(I)
- S(h);N_GUARD::S(I),XS(h)
- P(d);OGATE,P_PINQ(C)::QAR(C),XQ(g)
- Tries
- Try
- S(I);XQ(g)
- Threat
- B(F)
- Vars
- R(e);CHECK,OGATE::QAR(C)+P(E),XR(e)
- Refutation
- S(h);
- Try
- R(G);CHECK
- Vars
- R(e);CHECK,OGATE,XR(G)::QAR(C)+P(E),XR(e)
- Refutation
- K(f);P-FLIGHT,XP(H)
- Try
- Q(C);P_SPINQ(C),XP(d)
- Threat
- QAR(C),XQ(g)
- Vars
- Q(g);CHECK,XQ(C)::S(I),XQ(g)
- R(e);CHECK,N_GUARD::R1(G),XR(e)
- Q(g);N_PINQ(C),XB(F)::QAR1(C)
- Q(g);N_PINQ(C),XB(K)::QAB1(C),XP(c)
- Q(g);N_PINQ(C)::QAR2(C),XQ(g)
- Q(g);N_PINQ(C)::QAB1(C),XP(c)
- Q(g);N_PINQ(C)::QAR1(C),XQ(g)
- Q(g);N_PINQ(C)::QAR1(C)
- P(c);N_PINQ(C)::QAB(C)
- Refutation
- S(a);N_PINQ(C)
- Try
- Actual
- P(H);
- Threat
- P=Q
- Vars
- R(e);CHECK,OGATE::QAR(C)+P(E),XR(e)
- Q(g);N_GUARD,XP(J)::S(I),XP(d)
- Q(g);XB(F)::P=Q
- P(c);OGATEB::B(F)
- Q(g);::P=Q
- Q(g);OGATE::QAR(C)+P(E),XQ(g)
- R(e);::P=Q
- R(e);N_GUARD::QAR(C)
- S(a);::P=Q
- S(h);N_GUARD::S(I)
- P(b);::P=Q
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).