MESON Chess Problem Database
Problem Display
PID: 114807 (4K3/1n2N3/5p2/1N1RnQ1p/1pkp2bR/8/2P1p3/4B3 w - - 0 1)
Andrade, Barry Jack da Costa
Morning Post, 1923
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bf3
- 2.Rhxd4#
- 1...Bh3
- 2.Rhxd4#
- 1...Bxf5
- 2.Rhxd4#
- 1...Sd3
- 2.Rxd4#
- 2.Qxd3#
- 1...Sf3
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Sg6
- 2.Rxd4#
- 2.Qd3#
- 1...Sd7
- 2.Rxd4#
- 2.Qd3#
- 1...Sf7
- 2.Rxd4#
- 2.Qd3#
- 1...Sa5
- 2.Sd6#
- 1...Sc5
- 2.Sd6#
- 1...Sd6+
- 2.Sxd6#
- 1...Sd8
- 2.Sd6#
- 1...b3
- 2.Sa3#
- 1...d3
- 2.Qe4#
- 2.Qf4#
- 1...Bf3
- Tries
- 1.Rxg4?
- threat
- 2.Rgxd4#
- 1...Sd6+
- 2.Sxd6#
- 1...Sxg4
- 2.Rxd4#
- 2.Qd3#
- 1...Sc5
- 2.Sd6#
- 1...Sf3
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...hxg4!
- threat
- 1.Rc5+?
- 1...Sxc5
- 2.Sd6#
- 1...Kxc5!
- 1...Sxc5
- 1.Rxe5?
- threat
- 2.Qd3#
- 1...Sd6+
- 2.Sxd6#
- 1...Bxf5
- 2.Rxd4#
- 1...Sc5
- 2.Sd6#
- 2.Rxc5#
- 1...d3
- 2.Re4#
- 2.Qxd3#
- 2.Qe4#
- 2.Qe6#
- 2.Qf4#
- 1...fxe5!
- threat
- 1.Qe4?
- threat
- 2.Qxd4#
- 1...Sd6+
- 2.Sxd6#
- 1...Sc5
- 2.Sd6#
- 1...Sf3
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Bd7+!
- threat
- 1.Qc8+?
- 1...Bxc8
- 2.Rhxd4#
- 1...Sc5
- 2.Sd6#
- 2.Rxc5#
- 2.Qxc5#
- 1...Sc6!
- 1...Bxc8
- 1.Rxg4?
- Keys
- 1.Qe6!
- 1...Sd6+
- 2.Sxd6#
- 1...Bxe6
- 2.Rhxd4#
- 1...Sc5
- 2.Sd6#
- 1...Sa5
- 2.Sd6#
- 1...Bf3
- 2.Rhxd4#
- 1...Bh3
- 2.Rhxd4#
- 1...Bf5
- 2.Rhxd4#
- 1...Sd3
- 2.Rf5#
- 1...Sf3
- 2.Rf5#
- 1...Sc6
- 2.Rf5#
- 1...Sg6
- 2.Rf5#
- 1...Sd7
- 2.Rf5#
- 1...Sf7
- 2.Rf5#
- 1...Sd8
- 2.Sd6#
- 1...b3
- 2.Sa3#
- 1...d3
- 2.Rxe5#
- 1...f5
- 2.Rxe5#
- 1...Sd6+
- 1.Qe6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- B(e);OGATE,P_SPINP(d)::R1(C),XP(d)
- B(e);OGATE,P_SPINP(d),XQ(F)::R1(C),XP(d)
- S(f);N_GUARD::QAB1(F)
- S(i);N_GUARD::S(D)
- S(i);CHECK,N_GUARD::S(D),XS(i)
- P(b);N_GUARD::S(D)
- Tries
- Try
- R(C);P_PINP(d),XB(e)
- Threat
- R1(C),XP(d)
- Vars
- S(i);CHECK,N_GUARD::S(D),XS(i)
- S(i);N_GUARD::S(D)
- S(f);N_GUARD::QAB1(F)
- Refutation
- P(g);N_SPINP(d),XR(C)
- Try
- R(E);CHECK
- Vars
- S(i);SBLOCK,XR(E)::S(D)
- Refutation
- K(c);P-FLIGHT,P_SPINS(f),XR(E)
- Try
- R(E);XS(f)
- Threat
- QAB1(F)
- Vars
- S(i);CHECK,N_GUARD::S(D),XS(i)
- B(e);OGATE,P_SPINP(d),XQ(F)::R1(C),XP(d)
- Refutation
- P(h);XR(E)
- Try
- Q(F);P_PINP(d)
- Threat
- QAR1(F),XP(d)
- Vars
- S(i);CHECK,N_GUARD::S(D),XS(i)
- S(i);N_GUARD::S(D)
- S(f);N_GUARD::QAB1(F)
- Refutation
- B(e);CHECK
- Try
- Q(F);CHECK
- Vars
- B(e);OGATE,P_SPINP(d),XQ(F)::R1(C),XP(d)
- Refutation
- S(f);P_SPINS(f)
- Try
- Actual
- Q(F);
- Vars
- S(i);CHECK,N_GUARD::S(D),XS(i)
- B(e);OGATE,P_SPINP(d),XQ(F)::R1(C),XP(d)
- S(i);N_GUARD::S(D)
- B(e);OGATE,P_SPINP(d)::R1(C),XP(d)
- S(f);OGATE::QAB(F)+R(E)
- P(b);N_GUARD::S(D)
- P(d);P_SPINB(e)::QAB(F)+R(E),XS(f)
- P(h);S_CUTB(e)::QAB(F)+R(E),XS(f)
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).