MESON Chess Problem Database
Problem Display
PID: 262451 (4K3/2p5/B6Q/1R2B3/q7/3k1P2/4pP2/2R1bn2 w - - 0 1)
Robert, Philippe
Europe Echecs, 1972
#2
8 + 6
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Rbb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Ra5#
- 2.Rbc5#
- 2.Rd5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qc2
- 2.Rb3#
- 2.Rd5#
- 1...Qb3
- 2.Rxb3#
- 2.Rd5#
- 1...Qxb5+
- 2.Bxb5#
- 1...Qa1
- 2.Rb3#
- 2.Ra5#
- 2.Rd5#
- 1...Qa2
- 2.Rb3#
- 2.Rd5#
- 1...Qa3
- 2.Rb3#
- 2.Ra5#
- 2.Rd5#
- 1...Qb4
- 2.Rxb4#
- 2.Rd5#
- 1...Qc4
- 2.Rd5#
- 1...Qd4
- 2.Rb3#
- 2.Rd5#
- 1...Qe4
- 2.Rb3#
- 2.Rd5#
- 1...Qf4
- 2.Rd5#
- 1...Qg4
- 2.Rb3#
- 2.Rd5#
- 1...Qh4
- 2.Rb3#
- 2.Rd5#
- 1...Qa5
- 2.Rb3#
- 2.Rxa5#
- 2.Rd5#
- 1...Qxa6
- 2.Rd5#
- 1...Bxf2
- 2.Rc3#
- 1...Bc3
- 2.Rxc3#
- 1...Sd2
- 2.Rc3#
- 2.Qe3#
- 1...Sh2
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sg3
- 2.Qe3#
- 1...c6
- 2.Rb3#
- 2.Rd5#
- 1...Qd1
- Tries
- 1.Kf7?
- threat
- 2.Rb3#
- 2.Rd5#
- 1...Qb3+
- 2.Rxb3#
- 2.Rd5#
- 1...Qc4+
- 2.Rd5#
- 1...Qxb5
- 2.Bxb5#
- 1...Qxa6
- 2.Rd5#
- 1...Bc3
- 2.Rxc3#
- 2.Rd5#
- 1...Se3
- 2.Rd5#
- 2.Qxe3#
- 1...Qb4
- 2.Rxb4#
- 2.Rd5#
- 1...Bb4
- 2.Rd5#
- 1...c5
- 2.Rb3#
- 1...Qf4+!
- threat
- 1.Kd8?
- threat
- 2.Rb3#
- 2.Rd5#
- 1...Qd4+
- 2.Rd5#
- 1...Qxb5
- 2.Bxb5#
- 1...Qxa6
- 2.Rd5#
- 1...Qf4
- 2.Rd5#
- 1...Bc3
- 2.Rxc3#
- 2.Rd5#
- 1...Se3
- 2.Rd5#
- 2.Qxe3#
- 1...Qb3
- 2.Rxb3#
- 2.Rd5#
- 1...Qb4
- 2.Rxb4#
- 2.Rd5#
- 1...Qc4
- 2.Rd5#
- 1...Bb4
- 2.Rd5#
- 1...c5
- 2.Rb3#
- 1...Qh4+!
- threat
- 1.Rc6?
- threat
- 2.Rb3#
- 2.Rd5#
- 1...Qxb5
- 2.Bxb5#
- 1...Qxa6
- 2.Rd5#
- 1...Qf4
- 2.Rd5#
- 1...Bc3
- 2.Rxc3#
- 1...Se3
- 2.Rd5#
- 2.Qxe3#
- 1...Qb3
- 2.Rxb3#
- 2.Rd5#
- 1...Qb4
- 2.Rxb4#
- 2.Rd5#
- 1...Bb4
- 2.Rd5#
- 1...Qc4!
- threat
- 1.Qd6+?
- 1...Qd4
- 2.Rb2#
- 2.Qxd4#
- 1...cxd6!
- 1...Qd4
- 1.Qg6+?
- 1...Qe4
- 2.Rb2#
- 2.Rd5#
- 1...Kd2!
- 1...Qe4
- 1.Qh7+?
- 1...Qe4
- 2.Rb2#
- 2.Rd5#
- 1...Kd2!
- 1...Qe4
- 1.Kf7?
- Keys
- 1.Qc6!
- threat
- 2.Rd5#
- 1...Kd2
- 2.Qc3#
- 1...Qxb5
- 2.Qd7#
- 1...Bxf2
- 2.Qc3#
- 1...Qd4
- 2.Qc2#
- threat
- 1.Qc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(e);CHECK,OGATE,P_SPINQ(e),XR(D)::B(F),XQ(e)
- Q(e);N_PINR(D)::R(D)
- Q(e);N_PINR(D)::B(F)+R(D),DCHECK
- Q(e);N_PINR(D),XB(F)::R(D)
- B(a);N_GUARD,XP(B)::R1(A)
- B(a);N_GUARD::R1(A),XB(a)
- S(b);N_GUARD::QAR1(G)
- S(b);N_GUARD::QAR1(G),XS(b)
- Tries
- Try
- K(H);N_SPINR(D),S_FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK::R(D)
- Q(e);OGATE,P_SPINQ(e),XR(D)::B(F),XQ(e)
- Q(e);XB(F)::R(D)
- B(a);::B(F)+R(D),DCHECK
- P(f);::B(F)+R(D),DCHECK
- Refutation
- Q(e);CHECK
- Try
- K(H);N_SPINR(D),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK::B(F)+R(D)
- Q(e);OGATE,P_SPINQ(e),XR(D)::B(F),XQ(e)
- Q(e);XB(F)::R(D)
- Q(e);::B(F)+R(D),DCHECK
- Q(e);::R(D)
- B(a);::B(F)+R(D),DCHECK
- P(f);::B(F)+R(D),DCHECK
- Refutation
- Q(e);CHECK
- Try
- R(A);N_SPINR(D)
- Threat
- DUALS(2)
- Vars
- Q(e);OGATE,P_PINR(A),P_SPINQ(e),XR(D)::B(F),XQ(e)
- Q(e);XB(F)::R(D)
- Q(e);::B(F)+R(D),DCHECK
- B(a);N_GUARD::R1(A),XB(a)
- B(a);::B(F)+R(D),DCHECK
- Refutation
- Q(e);
- Try
- Q(G);CHECK
- Refutation
- P(f);XQ(G)
- Try
- Q(G);CHECK
- Refutation
- K(d);P-FLIGHT
- Try
- Q(G);CHECK
- Refutation
- K(d);P-FLIGHT
- Try
- Actual
- Q(G);N_SPINR(D)
- Threat
- B(F)+R(D),DCHECK
- Vars
- K(d);P-FLIGHT,S_CUTB(a)::QAB1(G)
- Q(e);N_GUARD,P_PINQ(G),P_SPINQ(e),XR(D)::QAR(G)
- B(a);N_GUARD,XP(B)::QAR1(G)
- Q(e);N_GUARD::QAB1(G)
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).