MESON Chess Problem Database
Problem Display
PID: 265477 (RR6/7B/4Q1p1/2p5/2Prp3/1p1k4/1p2pP2/nK2B3 w - - 0 1)
Degener, Udo
64 Shakhmatnoe obozrenie, 2022
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Rd5
- 2.Qxd5#
- 1...Rd8
- 2.Rxd8#
- 1...Sc2
- 2.Rxb3#
- 1...Rd5
- Tries
- 1.Bxg6?
- 1...Rd5
- 2.Qxd5#
- 2.Qxe4#
- 1...Rd6
- 2.Qxe4#
- 1...Rd7
- 2.Qxe4#
- 1...Rd8
- 2.Rxd8#
- 2.Qxe4#
- 1...Sc2
- 2.Rxb3#
- 1...Rxc4!
- 1...Rd5
- 1.Bg8?
- 1...Rxc4
- 2.Qxc4#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Rd8
- 2.Rxd8#
- 1...Sc2
- 2.Rxb3#
- 1...e3
- 2.Qxe3#
- 1...g5!
- 1...Rxc4
- 1.Rb4?
- 1...Rxc4
- 2.Qxc4#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Rd8
- 2.Rxd8#
- 1...Sc2
- 2.Rxb3#
- 1...e3
- 2.Qxe3#
- 1...g5
- 2.Qh3#
- 1...cxb4!
- 1...Rxc4
- 1.Rd8?
- 1...Rxd8
- 2.Rxd8#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Rxd6#
- 1...Rd7
- 2.Rxd7#
- 1...e3
- 2.Bxg6#
- 1...g5
- 2.Bxe4#
- 1...Sc2!
- 1...Rxd8
- 1.Qd5?
- 1...Sc2
- 2.Rxb3#
- 1...e3
- 2.Bxg6#
- 1...g5
- 2.Bxe4#
- 1...Rxd5!
- 1...Sc2
- 1.Bxg6?
- Keys
- 1.Ra4!
- 1...Rxc4
- 2.Qxc4#
- 1...Rd5
- 2.Qxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Rd8
- 2.Rxd8#
- 1...Sc2
- 2.Rxb3#
- 1...e3
- 2.Qxe3#
- 1...g5
- 2.Qh3#
- 1...Rxc4
- 1.Ra4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- R(f);OGATEB::QAR2(E),XR(f)
- R(f);OGATEB::R(H),XR(f)
- S(a);N_GUARD::R(H),XP(d)
- Tries
- Try
- B(F);P_PINP(g),XP(i)
- Vars
- R(f);N_GUARD::QAB1(E),XP(g)
- S(a);N_GUARD::R(H),XP(d)
- Refutation
- R(f);XP(D)
- Try
- B(F);
- Vars
- R(f);OGATE,XP(D)::QAB1(E),XR(f)
- R(f);OGATEB::QAR2(E),XR(f)
- R(f);OGATEB::QAR(E),XR(f)
- R(f);OGATEB::R(H),XR(f)
- S(a);N_GUARD::R(H),XP(d)
- P(g);OGATE::QAR1(E),XP(g)
- Refutation
- P(i);
- Try
- R(H);
- Vars
- R(f);OGATE,XP(D)::QAB1(E),XR(f)
- R(f);OGATEB::QAR2(E),XR(f)
- R(f);OGATEB::QAR(E),XR(f)
- R(f);OGATEB::R(G),XR(f)
- S(a);N_GUARD::R(H),XP(d)
- P(g);OGATE,P_SPINP(i)::QAR1(E),XP(g)
- P(i);P_SPINP(g)::QAR(E)
- Refutation
- P(h);XR(H)
- Try
- R(H);P_PINR(f)
- Vars
- R(f);N_SPINR(f),OGATE,XR(H)::R(G),XR(f)
- R(f);OGATEB::QAR2(E),XR(f)
- R(f);OGATEB::R(H),XR(f)
- P(g);OGATEB,P_SPINP(i)::B(F),XP(i)
- P(i);OGATE,P_SPINP(g)::B(F),XP(g)
- Refutation
- S(a);
- Try
- Q(E);P_PINR(f)
- Vars
- S(a);N_GUARD::R(H),XP(d)
- P(g);OGATEB,P_SPINP(i)::B(F),XP(i)
- P(i);OGATE,P_SPINP(g)::B(F),XP(g)
- Refutation
- R(f);N_SPINR(f),XQ(E)
- Try
- Actual
- R(G);
- Vars
- R(f);OGATE,XP(D)::QAB1(E),XR(f)
- R(f);OGATEB::QAR2(E),XR(f)
- R(f);OGATEB::QAR(E),XR(f)
- R(f);OGATEB::R(H),XR(f)
- S(a);N_GUARD::R(H),XP(d)
- P(g);OGATE,P_SPINP(i)::QAR1(E),XP(g)
- P(i);P_SPINP(g)::QAR(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).