MESON Chess Problem Database
Problem Display
PID: 59799 (5K2/bp6/5B2/1p2Rn2/1p1k3N/8/1PQ1Br2/3r3q w - - 0 1)
Casa, Alex
3rd Comm., StrateGems, 2005
#2
7 + 9
| 145 | StrateGems | 2007 |
| 5454 | Near Snap | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Qxd1#
- 1...Qe4
- 2.Qxe4#
- 1...Qd5
- 2.Re4#
- 1...Qc6
- 2.Qxd1#
- 1...Qe1
- 2.Qe4#
- 1...Qf1
- 2.Qe4#
- 1...Qg1
- 2.Qe4#
- 1...Qh2
- 2.Qxd1#
- 2.Qe4#
- 1...Qh3
- 2.Qe4#
- 1...Qxh4
- 2.Qxd1#
- 1...Ra1
- 2.Qd3#
- 2.Qd2#
- 1...Rb1
- 2.Qd3#
- 2.Qd2#
- 1...Rc1
- 2.Qd3#
- 2.Qd2#
- 1...Re1
- 2.Qd3#
- 2.Qd2#
- 1...Rdf1
- 2.Qd3#
- 2.Qd2#
- 1...Rg1
- 2.Qd3#
- 2.Qd2#
- 1...Rd2
- 2.Qxd2#
- 1...Rd3
- 2.Qxd3#
- 1...Rxe2
- 2.Sxf5#
- 1...Rg2
- 2.Sf3#
- 2.Sxf5#
- 2.Qe4#
- 1...Rh2
- 2.Sxf5#
- 1...Rf3
- 2.Qe4#
- 1...Bc5+
- 2.Qxc5#
- 1...Bb8
- 2.Qc5#
- 1...Se3
- 2.Rf5#
- 1...b3
- 2.Qc3#
- 1...Qg2
- Tries
- 1.Sf3+?
- 1...Rxf3
- 2.Qe4#
- 1...Qxf3!
- 1...Rxf3
- 1.Bxb5?
- threat
- 2.Qc4#
- 1...Bc5+
- 2.Qxc5#
- 1...Rxc2
- 2.Sxf5#
- 1...Qe4
- 2.Qxe4#
- 1...Qd5
- 2.Re4#
- 1...Qf1
- 2.Qe4#
- 1...Rc1
- 2.Qd3#
- 1...Se3
- 2.Rf5#
- 1...Sd6
- 2.Qxf2#
- 1...Qc6!
- threat
- 1.Qxf5?
- threat
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qxf2#
- 1...Bc5+
- 2.Re7#
- 1...Qxh4
- 2.Re4#
- 2.Qd7#
- 1...Rxf5
- 2.Sxf5#
- 1...Qe4
- 2.Rxe4#
- 2.Qxe4#
- 1...Qd5
- 2.Qxf2#
- 1...Rd3
- 2.Re4#
- 2.Qxd3#
- 1...Qg2
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Qf3
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Qc6
- 2.Re4#
- 2.Re6#
- 2.Qxf2#
- 1...Qe1
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qe4#
- 2.Qd7#
- 1...Qf1
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qe4#
- 2.Qd7#
- 1...Qg1
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qe4#
- 2.Qd7#
- 1...Qh2
- 2.Re4#
- 2.Qe4#
- 2.Qd7#
- 1...Qh3
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qe4#
- 1...Rdf1
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qd3#
- 1...Rff1
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rg2
- 2.Sf3#
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qe4#
- 2.Qd7#
- 2.Qf4#
- 1...Rh2
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rf3
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 2.Qe4#
- 2.Qd7#
- 1...Rf4
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Bb8
- 2.Re4#
- 2.Qxf2#
- 1...Rxe2!
- threat
- 1.Sf3+?
- Keys
- 1.Qb3!
- threat
- 2.Qxb4#
- 1...Bc5+
- 2.Re7#
- 1...Rxe2
- 2.Sxf5#
- 1...Qd5
- 2.Qxd5#
- 1...Qe4
- 2.Rd5#
- 1...Qc6
- 2.Qxd1#
- 1...Qe1
- 2.Qd5#
- 1...Rc1
- 2.Qd3#
- 1...Se3
- 2.Qxe3#
- 1...Sd6
- 2.Qe3#
- threat
- 1.Qb3!
Anticipated by 113107(1964)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- Q(b);N_GUARD::QAR(B),XR(a)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- Q(b);SBLOCK::B(F)+R(E),DCHECK
- Q(b);N_GUARD::QAR1(B)
- Q(b);N_GUARD,XS(D)::QAR(B),XR(a)
- R(a);N_GUARD::QAR2(B),XR(a)
- R(a);N_GUARD::QAR1(B),XR(a)
- R(c);N_GUARD,XB(C)::S(D),XS(g)
- R(c);N_GUARD::S(D),XS(g)
- R(c);S_CUTQ(b)::QAR1(B)
- B(h);CHECK,N_GUARD::QAB1(B),XB(h)
- B(h);N_GUARD::QAB1(B)
- S(g);P_PINB(F),SBLOCK::B(F)+R(E)
- P(d);N_GUARD::QAB1(B)
- Tries
- Try
- S(D);CHECK
- Vars
- R(c);XS(D)::QAR1(B)
- Refutation
- Q(b);XS(D)
- Try
- B(C);XP(f)
- Threat
- QAR1(B)
- Vars
- B(h);CHECK,N_GUARD::QAB1(B),XB(h)
- R(c);N_GUARD,XQ(B)::S(D),XS(g)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- Q(b);SBLOCK::B(F)+R(E),DCHECK
- Q(b);N_GUARD::QAR1(B)
- R(a);N_GUARD::QAR1(B)
- S(g);P_PINB(F),SBLOCK::B(F)+R(E)
- S(g);N_GUARD,P_PINB(F)::QAB(B),XR(c)
- Refutation
- Q(b);
- Try
- Q(B);XS(g)
- Threat
- DUALS(5)
- Vars
- B(h);CHECK::B(F)+R(E)
- R(c);P_PINB(F),XQ(B)::S(D),XR(c)
- Q(b);::QAB(B),XR(c)
- Refutation
- R(c);XB(C)
- Try
- Actual
- Q(B);
- Threat
- QAR2(B),XP(d)
- Vars
- B(h);CHECK,SBLOCK::B(F)+R(E)
- R(c);N_GUARD,XB(C)::S(D),XS(g)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- Q(b);SBLOCK::B(F)+R(E),DCHECK
- Q(b);N_GUARD::QAR(B),XR(a)
- Q(b);N_GUARD::QAR1(B)
- R(a);N_GUARD::QAR1(B)
- S(g);N_GUARD,P_PINB(F)::QAB1(B),XS(g)
- S(g);N_GUARD,P_PINB(F)::QAB1(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).