MESON Chess Problem Database
Problem Display
PID: 102484 (K5Q1/n3N3/5Bp1/3p4/1r2bk1n/6pP/4R1p1/1B2N3 w - - 0 1)
Groeneveld, Cornelis
Le Courrier des Echecs, 1956
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Qb8#
- 1...Rd4
- 2.Qb8#
- 1...Rb8+
- 2.Qxb8#
- 1...Bf3
- 2.Sd3#
- 1...Bf5
- 2.Sxd5#
- 1...Sf3
- 2.Sxg2#
- 1...Sf5
- 2.Sxg6#
- 1...d4+
- 2.Rxe4#
- 1...g5
- 2.Qxg5#
- 1...Ra4
- Tries
- 1.Bg5+?
- 1...Ke5
- 2.Qxd5#
- 1...Kxg5!
- 1...Ke5
- 1.Qxd5?
- threat
- 2.Bg5#
- 1...Bxd5+
- 2.Sxd5#
- 1...Bf5
- 2.Qd2#
- 2.Qe5#
- 2.Qd6#
- 1...Sf3
- 2.Sxg2#
- 1...Sf5
- 2.Sxg6#
- 1...g5
- 2.Be5#
- 2.Bxg5#
- 1...Rb8+!
- threat
- 1.Qe6?
- threat
- 2.Qg4#
- 2.Qe5#
- 2.Qd6#
- 1...d4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Rb6
- 2.Qg4#
- 2.Qe5#
- 1...Bf3
- 2.Sd3#
- 2.Qe3#
- 2.Qe5#
- 2.Qd6#
- 1...Bf5
- 2.Sxd5#
- 2.Qe3#
- 2.Qe5#
- 2.Qd6#
- 1...Sf3
- 2.Sxg2#
- 2.Qg4#
- 1...Sf5
- 2.Sxg6#
- 2.Qe5#
- 1...Sb5
- 2.Qg4#
- 2.Qe5#
- 1...Sc6
- 2.Qg4#
- 1...Sc8
- 2.Qg4#
- 2.Qe5#
- 1...Rb8+!
- threat
- 1.Qc8?
- threat
- 2.Qg4#
- 2.Qc1#
- 2.Qc7#
- 1...Rb8+
- 2.Qxb8#
- 1...d4+
- 2.Rxe4#
- 1...Rxb1
- 2.Qg4#
- 2.Qc7#
- 1...g1Q
- 2.Qg4#
- 2.Qc7#
- 1...g1B
- 2.Qg4#
- 2.Qc7#
- 1...Rb2
- 2.Qg4#
- 2.Qc7#
- 1...Rb3
- 2.Qg4#
- 2.Qc7#
- 1...Rc4
- 2.Qg4#
- 1...Rd4
- 2.Qg4#
- 2.Qc7#
- 2.Qb8#
- 1...Rb6
- 2.Qg4#
- 2.Qc1#
- 1...Rb7
- 2.Qg4#
- 2.Qc1#
- 1...Bc2
- 2.Sxd5#
- 2.Qg4#
- 2.Qc7#
- 1...Bf3
- 2.Sd3#
- 2.Qc1#
- 2.Qc7#
- 1...Bf5
- 2.Sxd5#
- 2.Qc1#
- 2.Qc7#
- 1...Sf3
- 2.Sxg2#
- 2.Qg4#
- 1...Sf5
- 2.Sxg6#
- 1...Sb5
- 2.Qg4#
- 2.Qc1#
- 1...Sc6
- 2.Qg4#
- 1...Sxc8!
- threat
- 1.Bg5+?
- Keys
- 1.Qh8!
- threat
- 2.Qxh4#
- 1...Rb8+
- 2.Qxb8#
- 1...d4+
- 2.Rxe4#
- 1...Bf3
- 2.Sd3#
- 1...Bf5
- 2.Sxd5#
- 1...Sf3
- 2.Sxg2#
- 1...Sf5
- 2.Sxg6#
- 1...g5
- 2.Be5#
- threat
- 1.Qh8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(c);N_GUARD::QAB(H)
- R(c);CHECK,N_GUARD::QAB(H),XR(c)
- B(d);N_GUARD,SBLOCK::S(B)
- B(d);N_GUARD::S(F),XP(g)
- S(f);N_GUARD,SBLOCK,S_CUTB(d)::S(B),XP(a)
- S(f);N_GUARD,SBLOCK,S_CUTB(d)::S(F),XP(h)
- P(g);CHECK,N_GUARD,S_CUTR(c)::R1(C),XB(d)
- P(h);OGATE::QAB1(H),XP(h)
- Tries
- Try
- B(E);CHECK
- Vars
- K(e);P_SPINB(d),S_FLIGHT::QAR1(H),XP(g)
- Refutation
- K(e);P_SPINP(h),S_FLIGHT,XB(E)
- Try
- Q(H);P_SPINQ(H),XP(g)
- Threat
- B(E)
- Vars
- B(d);CHECK,XQ(H)::S(F),XB(d)
- S(f);N_GUARD,SBLOCK,S_CUTB(d)::S(B),XP(a)
- S(f);N_GUARD,S_CUTB(d)::S(F),XP(h)
- Refutation
- R(c);CHECK
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- S(i);::QAR1(H)
- Refutation
- R(c);CHECK
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- R(c);CHECK,N_GUARD::QAB(H),XR(c)
- P(g);CHECK,N_GUARD,S_CUTR(c)::R1(C),XB(d)
- R(c);::QAR1(H)
- S(f);N_GUARD,S_CUTB(d)::S(F),XP(h)
- S(i);::QAR1(H)
- Refutation
- S(i);XQ(H)
- Try
- Actual
- Q(H);
- Threat
- QAR2(H),XS(f)
- Vars
- R(c);CHECK,N_GUARD::QAB(H),XR(c)
- P(g);CHECK,N_GUARD,S_CUTR(c)::R1(C),XB(d)
- B(d);N_GUARD,SBLOCK::S(B)
- B(d);N_GUARD::S(F),XP(g)
- S(f);N_GUARD,SBLOCK,S_CUTB(d)::S(B),XP(a)
- S(f);N_GUARD,SBLOCK,S_CUTB(d)::S(F),XP(h)
- P(h);SBLOCK::B(E)
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).