MESON Chess Problem Database
Problem Display
PID: 10823 (1b3qB1/3Pp2N/r5p1/1P3k1p/pQp1R3/K7/8/4R3 w - - 0 1)
Quack, Godfrey C
The Problemist, 1968
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra5
- 2.Be6#
- 1...Re6
- 2.Bxe6#
- 1...Ra7
- 2.Be6#
- 1...Ra8
- 2.Be6#
- 1...Bd6
- 2.Be6#
- 1...e6
- 2.Qxf8#
- 1...Ra5
- Tries
- 1.Rf1+?
- 1...Bf4
- 2.Rfxf4#
- 1...Kxe4!
- 1...Bf4
- 1.Rh4?
- threat
- 2.Qb1#
- 1...Re6
- 2.Bxe6#
- 1...Bd6
- 2.Be6#
- 1...c3
- 2.Qe4#
- 1...e5
- 2.Rf1#
- 1...e6
- 2.Qxf8#
- 1...Rd6!
- threat
- 1.Qc5+?
- 1...Be5
- 2.Qxe5#
- 1...e5!
- 1...Be5
- 1.Rf1+?
- Keys
- 1.Rxc4!
- threat
- 2.Qb1#
- 1...Bf4
- 2.Rxf4#
- 1...Rd6
- 2.Rf4#
- 1...Re6
- 2.Bxe6#
- 1...Bd6
- 2.Be6#
- 1...e5
- 2.Rf1#
- 1...e6
- 2.Qxf8#
- threat
- 1.Rxc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- R(e);N_GUARD::B(H)
- R(e);N_GUARD::B(H),XR(e)
- B(h);P_PINQ(C),S_CUTR(e)::B(H)
- P(g);OGATE,P_PINQ(C)::QAR(C),XQ(i)
- Tries
- Try
- R(A);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::R1(A),XB(h)
- Refutation
- K(c);P_SPINP(b),S_FLIGHT,XR(D)
- Try
- R(D);
- Threat
- QAB(C)
- Vars
- R(e);N_GUARD::B(H),XR(e)
- B(h);P_PINQ(C),S_CUTR(e)::B(H)
- P(b);OGATE::QAB1(C)
- P(g);P_PINQ(C),SBLOCK,S_CUTB(h)::R(A)
- P(g);OGATE,P_PINQ(C)::QAR(C),XQ(i)
- Refutation
- R(e);
- Try
- Q(C);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAR1(C),XB(h)
- Refutation
- P(g);P_PINQ(C),P_SPINP(g)
- Try
- Actual
- R(D);XP(b)
- Threat
- QAB(C)
- Vars
- B(h);N_GUARD::R1(D),XB(h)
- R(e);S_CUTB(h)::R1(D)
- R(e);N_GUARD::B(H),XR(e)
- B(h);P_PINQ(C),S_CUTR(e)::B(H)
- P(g);P_PINQ(C),SBLOCK,S_CUTB(h)::R(A)
- P(g);OGATE,P_PINQ(C)::QAR(C),XQ(i)
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).