MESON Chess Problem Database
Problem Display
PID: 242680 (Bqn5/5p2/8/3RB1p1/R2Nk3/6P1/Qr2P3/3N3K w - - 0 1)
Hartong, Jan
Parallele 50, 1949
#2
10 + 6
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Rb5#
- 1...Qb5
- 2.Rxb5#
- 1...Rb1
- 2.Qc2#
- 1...Rc2
- 2.Qxc2#
- 1...Rxe2
- 2.Qxe2#
- 1...Rb4
- 2.Qc2#
- 1...Rb5
- 2.Qc2#
- 1...Rb6
- 2.Qc2#
- 1...Qb4
- Tries
- 1.Sb5+?
- 1...Rb4
- 2.Qb1#
- 2.Qc2#
- 1...Kf5!
- 1...Rb4
- 1.Bf4?
- threat
- 2.Sf2#
- 2.Sc3#
- 2.Re5#
- 1...Qxf4
- 2.Sb3#
- 2.Rb5#
- 1...Rxe2
- 2.Qxe2#
- 1...Qb4
- 2.Sf2#
- 1...Qe5
- 2.Sf2#
- 2.Sc3#
- 2.Rxe5#
- 1...Qc7
- 2.Sf2#
- 2.Re5#
- 1...Qb3
- 2.Sf2#
- 2.Sxb3#
- 2.Re5#
- 1...Rb1
- 2.Re5#
- 2.Qc2#
- 1...Rc2
- 2.Sf2#
- 2.Re5#
- 2.Qxc2#
- 1...Rb3
- 2.Sf2#
- 2.Re5#
- 1...Rb4
- 2.Sf2#
- 2.Sc3#
- 2.Qc2#
- 1...Rb7
- 2.Sf2#
- 2.Sc3#
- 2.Sb5#
- 1...gxf4!
- threat
- 1.Bg7?
- threat
- 2.Re5#
- 1...Qxg3
- 2.Sb3#
- 1...Rxe2
- 2.Qxe2#
- 1...Qb4
- 2.Rb5#
- 1...Qe5
- 2.Rxe5#
- 1...Rb4
- 2.Qc2#
- 1...Rb7
- 2.Sb5#
- 1...f6!
- threat
- 1.Bxb8?
- threat
- 2.Sb3#
- 2.Rb5#
- 2.Re5#
- 1...Rxa2
- 2.Rda5#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 2.Rd7#
- 2.Rd8#
- 1...Rxe2
- 2.Qxe2#
- 1...Rxb8
- 2.Sb5#
- 2.Qc2#
- 1...Rc2
- 2.Sxc2#
- 2.Rc5#
- 2.Re5#
- 2.Qxc2#
- 1...Rd2
- 2.Rda5#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 2.Rd7#
- 2.Rd8#
- 1...Rb3
- 2.Sxb3#
- 2.Rb5#
- 2.Re5#
- 1...Rb4
- 2.Qc2#
- 1...Rb5
- 2.Sxb5#
- 2.Rxb5#
- 2.Re5#
- 2.Qc2#
- 1...Rb6
- 2.Sb5#
- 2.Re5#
- 2.Qc2#
- 1...Rb7
- 2.Sb5#
- 2.Re5#
- 1...Sb6
- 2.Re5#
- 1...Sa7
- 2.Sb3#
- 2.Re5#
- 1...Se7
- 2.Sb3#
- 2.Re5#
- 1...Sd6!
- threat
- 1.Bh8?
- threat
- 2.Re5#
- 1...Qxg3
- 2.Sb3#
- 1...Rxe2
- 2.Qxe2#
- 1...Qb4
- 2.Rb5#
- 1...Qe5
- 2.Rxe5#
- 1...Rb4
- 2.Qc2#
- 1...Rb7
- 2.Sb5#
- 1...f6!
- threat
- 1.Rb5+?
- 1...Qb7
- 2.Bxb7#
- 1...Qxa8!
- 1...Qb7
- 1.Qb1+?
- 1...Rc2
- 2.Qxc2#
- 1...Rxb1!
- 1...Rc2
- 1.Sb5+?
- Keys
- 1.Bf6!
- threat
- 2.Re5#
- 1...Qxg3
- 2.Sb3#
- 1...Rxe2
- 2.Qxe2#
- 1...Qb4
- 2.Rb5#
- 1...Qe5
- 2.Rxe5#
- 1...Rb4
- 2.Qc2#
- 1...Rb7
- 2.Sb5#
- threat
- 1.Bf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(e);N_GUARD::B(J)+R(H)
- Q(e);N_GUARD::B(J)+R(H),XQ(e)
- R(a);OGATE,P_PINS(A)::QAB(C)
- R(a);OGATE::QAB(C),XR(a)
- R(a);OGATE,XP(D)::QAR2(C),XR(a)
- R(a);OGATE::QAB(C)
- Tries
- Try
- S(G);CHECK
- Refutation
- K(b);S_FLIGHT
- Try
- B(I);
- Threat
- DUALS(3)
- Vars
- R(a);OGATE,XP(D)::QAR2(C),XR(a)
- Q(e);::S(A)
- Refutation
- P(c);XB(I)
- Try
- B(I);
- Threat
- B(J)+R(H),DCHECK
- Vars
- Q(e);N_GUARD,XP(E)::R(F)+S(G)
- R(a);OGATE,XP(D)::QAR2(C),XR(a)
- Q(e);N_GUARD::B(J)+R(H)
- Q(e);::B(J)+R(H),DCHECK,XQ(e)
- R(a);OGATE::QAB(C)
- R(a);N_GUARD::R(F)+S(G)
- Refutation
- P(d);
- Try
- B(I);XQ(e)
- Threat
- DUALS(3)
- Vars
- R(a);OGATE,XP(D)::QAR2(C),XR(a)
- R(a);OGATE::QAB(C)
- S(f);::B(J)+R(H),DCHECK
- Refutation
- S(f);
- Try
- B(I);
- Threat
- B(J)+R(H),DCHECK
- Vars
- Q(e);N_GUARD,XP(E)::R(F)+S(G)
- R(a);OGATE,XP(D)::QAR2(C),XR(a)
- Q(e);N_GUARD::B(J)+R(H)
- Q(e);::B(J)+R(H),DCHECK,XQ(e)
- R(a);OGATE::QAB(C)
- R(a);N_GUARD::R(F)+S(G)
- Refutation
- P(d);
- Try
- R(H);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::B(J),XQ(e)
- Refutation
- Q(e);XB(J)
- Try
- Q(C);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAB(C),XR(a)
- Refutation
- R(a);P_PINS(A),XQ(C)
- Try
- Actual
- B(I);
- Threat
- B(J)+R(H),DCHECK
- Vars
- Q(e);N_GUARD,XP(E)::R(F)+S(G)
- R(a);OGATE,XP(D)::QAR2(C),XR(a)
- Q(e);N_GUARD::B(J)+R(H)
- Q(e);::B(J)+R(H),DCHECK,XQ(e)
- R(a);OGATE::QAB(C)
- R(a);N_GUARD::R(F)+S(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).