MESON Chess Problem Database
Problem Display
PID: 165159 (1Q1n4/2rP1b2/p2p4/4kPP1/2B2p1N/1R4nK/2P2N1B/3Rr3 w - - 0 1)
Restad, Birger
Norsk Sjakkblad, 1926
#2
12 + 9
| 15148 | Sadier Collection | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Re4
- 2.Sg4#
- 1...Rxc4
- 2.Qxd6#
- 1...Rc5
- 2.Qxd6#
- 1...Ra7
- 2.Qxd6#
- 1...Rb7
- 2.Qxd6#
- 1...Rc8
- 2.Qxd6#
- 1...Bd5
- 2.Rxd5#
- 1...Bh5
- 2.Rd5#
- 1...Bg6
- 2.Rd5#
- 1...Be8
- 2.Rd5#
- 1...Se2
- 2.Re3#
- 1...Se4
- 2.Sg4#
- 1...Sxf5
- 2.Sf3#
- 1...Sc6
- 2.Qh8#
- 1...Se6
- 2.Rd5#
- 1...Sb7
- 2.Qh8#
- 1...f3
- 2.Bxg3#
- 1...d5
- 2.Qxc7#
- 1...Re4
- Tries
- 1.Sg6+?
- 1...Bxg6
- 2.Rd5#
- 1...Kxf5!
- 1...Bxg6
- 1.Re3+?
- 1...Se4
- 2.Sg4#
- 2.Qb2#
- 1...fxe3
- 2.Bxg3#
- 1...Rxe3!
- 1...Se4
- 1.Rxg3?
- threat
- 2.Qb2#
- 1...Rxc4
- 2.Qxd6#
- 1...fxg3
- 2.Bxg3#
- 1...f3
- 2.Rg1#
- 2.Rg2#
- 2.Rxf3#
- 2.Rg4#
- 1...d5
- 2.Qxc7#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Sg4#
- 1...Rb7
- 2.Qxd6#
- 1...Sc6
- 2.Qh8#
- 1...Se6
- 2.Rd5#
- 1...Sb7
- 2.Qh8#
- 1...Rxd1!
- threat
- 1.Rb5+?
- 1...Rc5
- 2.Qxd6#
- 1...Bd5
- 2.Rdxd5#
- 2.Rbxd5#
- 1...d5
- 2.Qxc7#
- 1...axb5!
- 1...Rc5
- 1.Qxd8?
- threat
- 2.Qf6#
- 2.Qh8#
- 1...Sxf5
- 2.Sf3#
- 2.Qf6#
- 1...f3
- 2.Bxg3#
- 1...d5
- 2.Qf6#
- 2.Qxc7#
- 1...Rc8
- 2.Qf6#
- 1...Be8
- 2.Rd5#
- 2.Qf6#
- 2.Qe7#
- 2.Qxe8#
- 1...Bg8
- 2.Qf6#
- 1...Se4
- 2.Sg4#
- 1...Sh5!
- threat
- 1.Sg6+?
- Keys
- 1.Rbd3!
- threat
- 2.Qb2#
- 1...Rxc4
- 2.Qxd6#
- 1...Sxf5
- 2.Sf3#
- 1...f3
- 2.Bxg3#
- 1...d5
- 2.Qxc7#
- 1...Re4
- 2.Sg4#
- 1...Rb7
- 2.Qxd6#
- 1...Se2
- 2.Re3#
- 1...Se4
- 2.Sg4#
- 1...Sc6
- 2.Qh8#
- 1...Se6
- 2.Rd5#
- 1...Sb7
- 2.Qh8#
- threat
- 1.Rbd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- R(a);SBLOCK::S(C)
- R(g);OGATE,P_SPINP(f),XB(G)::QAB1(L),XP(f)
- R(g);OGATE,P_SPINP(f)::QAB1(L),XP(f)
- B(h);N_GUARD::R1(A),XB(h)
- B(h);N_GUARD::R1(A)
- S(b);N_GUARD,P_SPINP(c),S_CUTR(a)::R(E)
- S(b);P_SPINP(c),SBLOCK::S(C)
- S(b);P_SPINP(c),SBLOCK,XP(I)::S(H)
- S(i);OGATE::QAB(L)
- S(i);S_CUTB(h)::R1(A)
- P(c);OGATEB,P_SPINS(b)::B(D),XS(b)
- P(f);OGATEB,P_SPINR(g)::QAB(L),XR(g)
- Tries
- Try
- S(H);CHECK
- Vars
- B(h);XS(H)::R1(A)
- Refutation
- K(d);P-FLIGHT,XP(I)
- Try
- R(E);CHECK
- Vars
- P(c);P_SPINS(b),S_CUTR(a),XR(E)::B(D),XS(b)
- Refutation
- R(a);XR(E)
- Try
- R(E);XS(b)
- Threat
- QAB(L)
- Vars
- R(g);OGATE,P_SPINP(f),XB(G)::QAB1(L),XP(f)
- P(c);OGATE,P_SPINP(c),XR(E)::B(D),XP(c)
- P(f);OGATEB,P_SPINR(g)::QAB(L),XR(g)
- R(a);N_GUARD,P_PINR(E)::R(E),XR(a)
- R(a);SBLOCK::S(C)
- R(g);OGATE,P_SPINP(f)::QAB1(L),XP(f)
- S(i);OGATE::QAB(L)
- S(i);S_CUTB(h)::R1(A)
- Refutation
- R(a);XR(A)
- Try
- R(E);CHECK
- Vars
- R(g);OGATE,P_SPINP(f),P_SPINR(g)::QAB1(L),XP(f)
- P(f);P_SPINP(f),P_SPINR(g),S_CUTB(h),S_CUTP(e)::QAB(L),XR(g)
- Refutation
- P(e);XR(E)
- Try
- Q(L);XS(i)
- Threat
- DUALS(2)
- Vars
- P(c);OGATEB,P_SPINS(b)::B(D),XS(b)
- R(g);::QAB1(L)
- B(h);::QAB1(L)
- S(b);P_SPINP(c),SBLOCK::S(C)
- Refutation
- S(b);P_SPINP(c)
- Try
- Actual
- R(E);
- Threat
- QAB(L)
- Vars
- R(g);OGATE,P_SPINP(f),XB(G)::QAB1(L),XP(f)
- S(b);P_SPINP(c),SBLOCK,XP(I)::S(H)
- P(c);OGATEB,P_SPINS(b)::B(D),XS(b)
- P(f);OGATEB,P_SPINR(g)::QAB(L),XR(g)
- R(a);SBLOCK::S(C)
- R(g);OGATE,P_SPINP(f)::QAB1(L),XP(f)
- S(b);N_GUARD,P_SPINP(c),S_CUTR(a)::R(E)
- S(b);P_SPINP(c),SBLOCK::S(C)
- S(i);OGATE::QAB(L)
- S(i);S_CUTB(h)::R1(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).