MESON Chess Problem Database
Problem Display
PID: 178706 (8/1p6/1P1pp3/NpBkPp2/1P1P1K2/2pQp1p1/6P1/8 w - - 0 1)
Maleika, Gerhard
4th Prize, Problem Observer Block-Threat Ty., 2009-2010
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...c2
- 2.Qb3#
- 1...e2
- 2.Qf3#
- 1...dxc5
- 2.dxc5#
- 1...dxe5+
- 2.dxe5#
- 1...c2
- Tries
- 1.Qxf5?
- threat
- 2.Qe4#
- 1...dxe5+
- 2.Qxe5#
- 1...exf5!
- threat
- 1.Qxc3?
- threat
- 2.Qb3#
- 1...dxc5
- 2.Qxc5#
- 1...dxe5+!
- threat
- 1.Qxe3?
- threat
- 2.Qf3#
- 1...dxe5+
- 2.Qxe5#
- 1...dxc5!
- threat
- 1.exd6?
- 1...c2
- 2.Qb3#
- 1...e2
- 2.Qf3#
- 1...e5+!
- 1...c2
- 1.Qxf5?
- Keys
- 1.Qd1!
- threat
- 2.Qb3#
- 2.Qf3#
- 1...dxe5+
- 2.dxe5#
- 1...dxc5
- 2.dxc5#
- 1...c2
- 2.Qf3#
- 1...e2
- 2.Qb3#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- P(a);OGATE::QAB(B)
- P(b);OGATE::QAB(B)
- P(g);OGATE,XB(G)::QAR(B)+P(D),XP(g)
- P(g);CHECK,OGATE,XP(H)::QAR(B)+P(D),XP(g)
- Tries
- Try
- Q(B);XP(f)
- Threat
- QAB1(B)
- Vars
- P(g);CHECK,OGATE,P_SPINP(g),XP(H)::QAR1(B),XP(g)
- Refutation
- P(h);XQ(B)
- Try
- Q(B);XP(a)
- Threat
- QAB(B)
- Vars
- P(g);OGATE,XB(G)::QAR1(B),XP(g)
- Refutation
- P(g);CHECK,XP(H)
- Try
- Q(B);XP(b)
- Threat
- QAB(B)
- Vars
- P(g);CHECK,OGATE,XP(H)::QAR1(B),XP(g)
- Refutation
- P(g);XB(G)
- Try
- P(H);XP(g)
- Vars
- P(a);OGATE::QAB(B)
- P(b);OGATE::QAB(B)
- Refutation
- P(h);CHECK
- Try
- Actual
- Q(B);
- Threat
- DUALS(2)
- Vars
- P(g);CHECK,OGATE,XP(H)::QAR(B)+P(D),XP(g)
- P(g);OGATE,XB(G)::QAR(B)+P(D),XP(g)
- P(a);::QAB(B)
- P(b);::QAB(B)
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).