MESON Chess Problem Database
Problem Display
PID: 48142 (2NRBR2/4P1pq/r3k3/r6p/4p3/4n3/1B4Q1/3b3K w - - 0 1)
Ahues, Herbert Siegfried Oskar
2nd Prize, Themes-64, 1957
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qg6
- 2.Qxg6#
- 1...Qg8
- 2.Qg6#
- 1...Qh8
- 2.Qg6#
- 1...Rd6
- 2.Rxd6#
- 1...Ra7
- 2.Rd6#
- 1...Ra8
- 2.Rd6#
- 1...Sd5
- 2.Bd7#
- 1...Sf5
- 2.Bf7#
- 1...g5
- 2.Rf6#
- 1...g6
- 2.Rf6#
- 1...Qg6
- Tries
- 1.Bc6?
- threat
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Rxc6
- 2.e8Q#
- 2.e8R#
- 1...Sxg2
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Qf5
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Qg6
- 2.Rd6#
- 2.Qxg6#
- 1...Qg8
- 2.Rd6#
- 2.Qg6#
- 2.e8Q#
- 2.e8R#
- 1...Qh6
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Qh8
- 2.Rd6#
- 2.Qg6#
- 2.e8Q#
- 2.e8R#
- 1...Ra1
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Ra2
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Ra3
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Ra4
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Rb5
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Rc5
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Rd5
- 2.e8Q#
- 2.e8R#
- 1...Re5
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Rf5
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Rg5
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Rb6
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Ra7
- 2.Rd6#
- 1...Ra8
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Bc2
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Be2
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Bb3
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Bf3
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Ba4
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Bg4
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Sf1
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Sc2
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Sc4
- 2.e8Q#
- 2.e8R#
- 1...Sg4
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Sd5
- 2.Bd7#
- 2.Rd6#
- 1...h4
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...g5
- 2.Rd6#
- 2.Rf6#
- 1...g6
- 2.Rd6#
- 2.Rf6#
- 1...Sf5!
- threat
- 1.Bg6?
- threat
- 2.e8Q#
- 2.e8R#
- 1...Qxg6
- 2.Qxg6#
- 1...Sxg2
- 2.e8Q#
- 2.e8R#
- 1...Rd6
- 2.Rxd6#
- 1...Qg8
- 2.e8Q#
- 2.e8R#
- 1...Qh6
- 2.e8Q#
- 2.e8R#
- 1...Qh8
- 2.e8Q#
- 2.e8R#
- 1...Ra1
- 2.Qxe4#
- 2.e8Q#
- 2.e8R#
- 1...Ra2
- 2.Qxe4#
- 2.e8Q#
- 2.e8R#
- 1...Ra3
- 2.Qxe4#
- 2.e8Q#
- 2.e8R#
- 1...Ra4
- 2.e8Q#
- 2.e8R#
- 1...Rb5
- 2.e8Q#
- 2.e8R#
- 1...Rc5
- 2.e8Q#
- 2.e8R#
- 1...Rd5
- 2.e8Q#
- 2.e8R#
- 1...Re5
- 2.e8Q#
- 2.e8R#
- 1...Rf5
- 2.e8Q#
- 2.e8R#
- 1...Rg5
- 2.e8Q#
- 2.e8R#
- 1...Rb6
- 2.e8Q#
- 2.e8R#
- 1...Rc6
- 2.e8Q#
- 2.e8R#
- 1...Ra7
- 2.Rd6#
- 1...Ra8
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Bc2
- 2.e8Q#
- 2.e8R#
- 1...Be2
- 2.e8Q#
- 2.e8R#
- 1...Bb3
- 2.e8Q#
- 2.e8R#
- 1...Bf3
- 2.e8Q#
- 2.e8R#
- 1...Bg4
- 2.e8Q#
- 2.e8R#
- 1...Sf1
- 2.e8Q#
- 2.e8R#
- 1...Sc2
- 2.e8Q#
- 2.e8R#
- 1...Sc4
- 2.e8Q#
- 2.e8R#
- 1...Sg4
- 2.e8Q#
- 2.e8R#
- 1...Sd5
- 2.Qxe4#
- 1...Sf5
- 2.Bf7#
- 1...h4
- 2.e8Q#
- 2.e8R#
- 1...Ba4!
- threat
- 1.Qxe4+?
- 1...Re5
- 2.Bd7#
- 2.Qxe5#
- 1...Qxe4+!
- 1...Re5
- 1.Bc6?
- Keys
- 1.Bb5!
- threat
- 2.e8Q#
- 2.e8R#
- 1...Rxb5
- 2.e8Q#
- 2.e8R#
- 1...Sxg2
- 2.e8Q#
- 2.e8R#
- 1...Rd6
- 2.Rxd6#
- 1...Qf5
- 2.e8Q#
- 2.e8R#
- 1...Qg6
- 2.Qxg6#
- 1...Qg8
- 2.Qxe4#
- 2.Qg6#
- 2.e8Q#
- 2.e8R#
- 1...Qh6
- 2.Qxe4#
- 2.e8Q#
- 2.e8R#
- 1...Qh8
- 2.Qxe4#
- 2.Qg6#
- 2.e8Q#
- 2.e8R#
- 1...Ra1
- 2.e8Q#
- 2.e8R#
- 1...Ra2
- 2.e8Q#
- 2.e8R#
- 1...Ra3
- 2.e8Q#
- 2.e8R#
- 1...Ra4
- 2.e8Q#
- 2.e8R#
- 1...Rb6
- 2.e8Q#
- 2.e8R#
- 1...Rc6
- 2.e8Q#
- 2.e8R#
- 1...Ra7
- 2.Rd6#
- 1...Ra8
- 2.Rd6#
- 2.e8Q#
- 2.e8R#
- 1...Bc2
- 2.e8Q#
- 2.e8R#
- 1...Be2
- 2.e8Q#
- 2.e8R#
- 1...Bb3
- 2.e8Q#
- 2.e8R#
- 1...Bf3
- 2.e8Q#
- 2.e8R#
- 1...Ba4
- 2.e8Q#
- 2.e8R#
- 1...Bg4
- 2.e8Q#
- 2.e8R#
- 1...Sf1
- 2.e8Q#
- 2.e8R#
- 1...Sc2
- 2.e8Q#
- 2.e8R#
- 1...Sc4
- 2.e8Q#
- 2.e8R#
- 1...Sg4
- 2.e8Q#
- 2.e8R#
- 1...Sd5
- 2.Bd7#
- 1...Sf5
- 2.Qxe4#
- 1...h4
- 2.e8Q#
- 2.e8R#
- 1...g5
- 2.Rf6#
- 1...g6
- 2.Rf6#
- 2.Qxe4#
- threat
- 1.Bb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- Q(i);N_GUARD::QAR2(C),XQ(i)
- Q(i);N_GUARD::QAR2(C)
- R(f);N_GUARD::R1(F),XR(f)
- R(f);N_GUARD::R1(F)
- S(b);SBLOCK::B(G)
- P(h);N_GUARD::R1(H)
- Tries
- Try
- B(G);
- Threat
- DUALS(3)
- Vars
- R(f);XB(G)::P=Q
- R(d);::P=Q
- R(f);::R1(F)
- S(b);::P=Q
- Refutation
- S(b);
- Try
- B(G);
- Threat
- P=Q
- Vars
- Q(i);OGATE,XB(G)::QAR2(C),XQ(i)
- S(b);XQ(C)::P=Q
- R(f);N_GUARD::R1(F),XR(f)
- Q(i);::P=Q
- R(d);::P=Q
- R(f);::P=Q
- R(f);N_GUARD::R1(F)
- B(a);::P=Q
- B(a);P_PINQ(C)::P=Q
- S(b);::P=Q
- S(b);S_CUTR(d)::QAR2(C),XP(c)
- S(b);SBLOCK::B(G)
- P(e);::P=Q
- Refutation
- B(a);
- Try
- Q(C);CHECK,XP(c)
- Refutation
- Q(i);CHECK,XQ(C)
- Try
- Actual
- B(G);
- Threat
- P=Q
- Vars
- R(d);XB(G)::P=Q
- S(b);XQ(C)::P=Q
- R(f);N_GUARD::R1(F),XR(f)
- Q(i);::P=Q
- Q(i);N_GUARD::QAR2(C),XQ(i)
- R(d);::P=Q
- R(f);::P=Q
- R(f);N_GUARD::R1(F)
- B(a);::P=Q
- B(a);P_PINQ(C)::P=Q
- S(b);::P=Q
- S(b);SBLOCK::B(G)
- S(b);S_CUTQ(i)::QAR2(C),XP(c)
- P(e);::P=Q
- P(h);N_GUARD::R1(H)
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).