MESON Chess Problem Database
Problem Display
PID: 170892 (1q6/3r3B/2R1PN1p/5R2/3k2nr/BPpP2P1/2b3p1/K1Q1n3 w - - 0 1)
Groeneveld, Cornelis
4th HM., Problemisten, 1982
#2
11 + 10
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rd5
- 2.Rxd5#
- 1...Ra7
- 2.Rd5#
- 1...Rb7
- 2.Rd5#
- 1...Rc7
- 2.Rd5#
- 2.Rd6#
- 1...Re7
- 2.Rd5#
- 1...Rf7
- 2.Rd5#
- 1...Rg7
- 2.Rd5#
- 1...Rxh7
- 2.Rd5#
- 1...Bxd3
- 2.Bc5#
- 1...Sxd3
- 2.Rc4#
- 1...Rd5
- Tries
- 1.Rf4+?
- 1...Qxf4
- 2.Qxf4#
- 1...Ke5!
- 1...Qxf4
- 1.Rg5?
- threat
- 2.Bc5#
- 2.Rc4#
- 1...Qxb3
- 2.Bc5#
- 2.Qf4#
- 1...Rxh7
- 2.Rd5#
- 1...Bxb3
- 2.Bc5#
- 1...Bxd3
- 2.Bc5#
- 1...Sxd3
- 2.Rc4#
- 1...Qe5
- 2.Rc4#
- 1...Qd6
- 2.Rc4#
- 1...Qa7
- 2.Rc4#
- 2.Qf4#
- 1...Qc7
- 2.Bc5#
- 1...Qb4
- 2.Qf4#
- 1...Qb5
- 2.Qf4#
- 1...Qb6
- 2.Rc4#
- 2.Qf4#
- 1...Qa8
- 2.Rc4#
- 2.Qf4#
- 1...Qc8
- 2.Bc5#
- 2.Qf4#
- 1...Qf8
- 2.Rc4#
- 2.Qf4#
- 1...Rd5
- 2.Rxd5#
- 2.Rc4#
- 1...Ra7
- 2.Rd5#
- 2.Rc4#
- 1...Rc7
- 2.Bc5#
- 2.Rd5#
- 2.Rd6#
- 2.Qf4#
- 1...Se3
- 2.Bc5#
- 1...Se5
- 2.Bc5#
- 1...hxg5!
- threat
- 1.Rh5?
- threat
- 2.Bc5#
- 2.Rc4#
- 1...Qxb3
- 2.Bc5#
- 2.Qf4#
- 1...Rxh7
- 2.Rd5#
- 1...Bxb3
- 2.Bc5#
- 1...Bxd3
- 2.Bc5#
- 1...Sxd3
- 2.Rc4#
- 1...Qe5
- 2.Rc4#
- 1...Qd6
- 2.Rc4#
- 1...Qa7
- 2.Rc4#
- 2.Qf4#
- 1...Qc7
- 2.Bc5#
- 1...Qb4
- 2.Qf4#
- 1...Qb5
- 2.Qf4#
- 1...Qb6
- 2.Rc4#
- 2.Qf4#
- 1...Qa8
- 2.Rc4#
- 2.Qf4#
- 1...Qc8
- 2.Bc5#
- 2.Qf4#
- 1...Qf8
- 2.Rc4#
- 2.Qf4#
- 1...Rd5
- 2.Rxd5#
- 2.Rc4#
- 1...Ra7
- 2.Rd5#
- 2.Rc4#
- 1...Rc7
- 2.Bc5#
- 2.Rd5#
- 2.Rd6#
- 2.Qf4#
- 1...Se3
- 2.Bc5#
- 1...Se5
- 2.Bc5#
- 1...Rxh5!
- threat
- 1.Rf4+?
- Keys
- 1.Re5!
- threat
- 2.Qf4#
- 1...Kxe5
- 2.Qf4#
- 1...Qxe5
- 2.Rc4#
- 1...Rxh7
- 2.Rd5#
- 1...Bxd3
- 2.Qxc3#
- 1...Sxd3
- 2.Re4#
- 1...Sxe5
- 2.Bc5#
- 1...Sxf6
- 2.Qe3#
- 1...Sf2
- 2.Qe3#
- 1...Sh2
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- threat
- 1.Re5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 7
- REMOVED MATES = 6
- Sets
- R(i);N_GUARD::R1(G),XR(i)
- R(i);N_GUARD,P_PINB(C)::R1(G)
- R(i);N_GUARD::R1(G)
- R(i);N_GUARD,XB(K)::R1(G)
- B(b);SBLOCK,XP(E)::B(C)
- S(a);SBLOCK,XP(E)::R1(H)
- Tries
- Try
- R(G);CHECK
- Vars
- Q(j);OGATE,XR(G)::QAR2(B),XQ(j)
- Refutation
- K(e);S_FLIGHT
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- R(i);N_GUARD,XB(K)::R1(G)
- B(b);XP(D)::B(C)
- B(b);XP(E)::B(C)
- S(a);XP(E)::R1(H)
- Q(j);::R1(H)
- Q(j);::B(C)
- Q(j);N_GUARD::QAR2(B)
- S(f);::B(C)
- Refutation
- P(h);XR(G)
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- R(i);N_GUARD,XB(K)::R1(G)
- B(b);XP(D)::B(C)
- B(b);XP(E)::B(C)
- S(a);XP(E)::R1(H)
- Q(j);::R1(H)
- Q(j);::B(C)
- Q(j);N_GUARD::QAR2(B)
- S(f);::B(C)
- Refutation
- R(g);XR(G)
- Try
- Actual
- R(G);
- Threat
- QAR2(B)
- Vars
- K(e);S_FLIGHT,XR(G)::QAB1(B)
- Q(j);SBLOCK,XR(G)::R1(H)
- R(i);N_GUARD,XB(K)::R1(G)
- B(b);OGATE,XP(E)::QAB1(B),XP(d)
- S(a);SBLOCK,XP(E)::R1(G)
- S(f);SBLOCK,XR(G)::B(C)
- S(f);N_GUARD,XS(J)::QAB1(B)
- S(f);N_GUARD::QAB1(B)
- S(f);N_GUARD::QAB1(B),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).