MESON Chess Problem Database
Problem Display
PID: 257627 (8/7n/2n5/1R6/4k3/2r1PNK1/2P5/1BbN4 w - - 0 1)
Ojanen, Antti Gottfried
Wiener Schachzeitung, 1936
#2
7 + 5
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Bxc2#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rxe3
- 2.Sf2#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c4#
- 1...Bb2
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Ba3
- 2.Sd2#
- 1...Bxe3
- 2.Sxc3#
- 1...Sb4
- 2.Re5#
- 1...Sd4
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa7
- 2.Re5#
- 1...Se7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sd8
- 2.Re5#
- 1...Sg5
- 2.Sxg5#
- 1...Sf6
- 2.Sg5#
- 1...Sf8
- 2.Sg5#
- 1...Rxc2
- Tries
- 1.Kg4?
- 1...Se5+
- 2.Rxe5#
- 1...Rxc2
- 2.Bxc2#
- 1...Rxe3
- 2.Sf2#
- 1...Bxe3
- 2.Sxc3#
- 1...Rc5
- 2.c4#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Bb2
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Ba3
- 2.Sd2#
- 1...Sb4
- 2.Re5#
- 1...Sd4
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Sa7
- 2.Re5#
- 1...Se7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sd8
- 2.Re5#
- 1...Sg5
- 2.Sxg5#
- 1...Sf8
- 2.Sg5#
- 1...Sf6+!
- 1...Se5+
- 1.Ra5?
- 1...Rxc2
- 2.Bxc2#
- 1...Rxe3
- 2.Sf2#
- 1...Bxe3
- 2.Sxc3#
- 1...Rc5
- 2.c4#
- 1...Se5
- 2.Rxe5#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Bb2
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Ba3
- 2.Sd2#
- 1...Sb4
- 2.Re5#
- 1...Sd4
- 2.Re5#
- 1...Sa7
- 2.Re5#
- 1...Se7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sd8
- 2.Re5#
- 1...Sg5
- 2.Sxg5#
- 1...Sf6
- 2.Sg5#
- 1...Sf8
- 2.Sg5#
- 1...Sxa5!
- 1...Rxc2
- 1.Kg4?
- Keys
- 1.Rc5!
- 1...Rxc2
- 2.Bxc2#
- 1...Rxe3
- 2.Sf2#
- 1...Rxc5
- 2.c4#
- 1...Bxe3
- 2.Sxc3#
- 1...Se5
- 2.Rxe5#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Bb2
- 2.Sd2#
- 1...Bd2
- 2.Sxd2#
- 1...Ba3
- 2.Sd2#
- 1...Sb4
- 2.Re5#
- 1...Sd4
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Sa7
- 2.Re5#
- 1...Se7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sd8
- 2.Re5#
- 1...Sg5
- 2.Sxg5#
- 1...Sf6
- 2.Sg5#
- 1...Sf8
- 2.Sg5#
- 1...Rxc2
- 1.Rc5!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
- R(b);OGATE::B(A)+P(C)
- R(b);OGATE::B(A)+P(C),XR(b)
- R(b);OGATE::P(C),XR(b)
- R(b);P_PINS(E),SBLOCK,XP(D)::S(B)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(E),XB(a)
- B(a);SBLOCK,XP(D)::S(B),XR(b)
- S(d);N_GUARD::R1(G)
- S(d);N_GUARD::R1(G),XS(d)
- S(e);N_GUARD::S(E),XS(e)
- S(e);N_GUARD::S(E)
- Tries
- Try
- K(F);P-FLIGHT
- Vars
- S(d);CHECK,N_GUARD::R1(G),XS(d)
- R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
- R(b);SBLOCK,XP(D)::S(B)
- B(a);SBLOCK,XP(D)::S(B),XR(b)
- R(b);OGATE::B(A)+P(C)
- R(b);OGATE::B(A)+P(C),XR(b)
- R(b);OGATE::P(C),XR(b)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(E),XB(a)
- S(d);N_GUARD::R1(G)
- S(e);N_GUARD::S(E),XS(e)
- S(e);N_GUARD::S(E)
- Refutation
- S(e);CHECK
- Try
- R(G);
- Vars
- R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
- R(b);P_PINS(E),SBLOCK,XP(D)::S(B)
- B(a);SBLOCK,XP(D)::S(B),XR(b)
- R(b);OGATE::B(A)+P(C)
- S(d);N_GUARD::R1(G),XS(d)
- R(b);OGATE::B(A)+P(C),XR(b)
- R(b);OGATE::P(C),XR(b)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(E),XB(a)
- S(d);N_GUARD::R1(G)
- S(e);N_GUARD::S(E),XS(e)
- S(e);N_GUARD::S(E)
- Refutation
- S(d);XR(G)
- Try
- Actual
- R(G);
- Vars
- R(b);OGATE,P_SPINR(b),XP(C)::B(A),XR(b)
- R(b);P_PINS(E),SBLOCK,XP(D)::S(B)
- R(b);OGATE,XR(G)::B(A)+P(C)
- B(a);SBLOCK,XP(D)::S(B),XR(b)
- S(d);N_GUARD::R1(G),XS(d)
- R(b);OGATE::B(A)+P(C)
- R(b);OGATE::B(A)+P(C),XR(b)
- R(b);OGATE::P(C),XR(b)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(E),XB(a)
- S(d);N_GUARD::R1(G)
- S(e);N_GUARD::S(E),XS(e)
- S(e);N_GUARD::S(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).