MESON Chess Problem Database
Problem Display
PID: 75724 (2q5/2pnp1p1/2RP4/r3RpKb/1ppk1Nn1/1P1B2N1/8/2Q5 w - - 0 1)
Arnstam, Knut Anders Olof
Schackvarlden, 1945
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rd5#
- 1...Ra2
- 2.Rd5#
- 1...Ra3
- 2.Rd5#
- 1...Ra4
- 2.Rd5#
- 1...Rd5
- 2.Rxd5#
- 1...Rxe5
- 2.Rxc4#
- 1...Ra6
- 2.Rd5#
- 1...Ra7
- 2.Rd5#
- 1...Ra8
- 2.Rd5#
- 1...Sgxe5
- 2.Sxf5#
- 1...Sc5
- 2.Rd5#
- 1...Sdxe5
- 2.Sge2#
- 1...cxb3
- 2.Qb2#
- 1...cxd3
- 2.Qb2#
- 1...Ra1
- Tries
- 1.Sfe2+?
- 1...Kxd3
- 2.Qd1#
- 1...Kxe5!
- 1...Kxd3
- 1.Re3?
- threat
- 2.Sge2#
- 2.Rxc4#
- 1...cxb3
- 2.Sge2#
- 2.Rc4#
- 1...cxd3
- 2.Rc4#
- 1...cxd6
- 2.Sge2#
- 1...Qa6
- 2.Sge2#
- 1...Qg8
- 2.Sge2#
- 1...Ra2
- 2.Sxf5#
- 2.Rxc4#
- 1...Rc5
- 2.Sge2#
- 1...Bf7
- 2.Sge2#
- 1...Sf2
- 2.Rxc4#
- 1...Sh2
- 2.Rxc4#
- 1...Sge5
- 2.Sxf5#
- 1...Sgf6
- 2.Rxc4#
- 1...Sh6
- 2.Rxc4#
- 1...Sc5
- 2.Sge2#
- 1...Sde5
- 2.Sge2#
- 1...Sb6
- 2.Sge2#
- 1...c3
- 2.Sge2#
- 2.Rc4#
- 1...Sxe3!
- threat
- 1.Re6?
- threat
- 2.Sge2#
- 2.Rxc4#
- 2.Qxc4#
- 1...cxb3
- 2.Sge2#
- 2.Rc4#
- 2.Qb2#
- 2.Qc4#
- 1...cxd3
- 2.Rc4#
- 2.Qb2#
- 2.Qc4#
- 1...cxd6
- 2.Sge2#
- 2.Qxc4#
- 1...Qa6
- 2.Sge2#
- 1...Ra2
- 2.Sxf5#
- 2.Rxc4#
- 2.Qxc4#
- 1...Rc5
- 2.Sge2#
- 1...Re5
- 2.Rxc4#
- 1...Sf2
- 2.Rxc4#
- 2.Qxc4#
- 1...Sh2
- 2.Rxc4#
- 2.Qxc4#
- 1...Sge5
- 2.Sxf5#
- 1...Sgf6
- 2.Rxc4#
- 2.Qxc4#
- 1...Sh6
- 2.Rxc4#
- 2.Qxc4#
- 1...Sc5
- 2.Sge2#
- 2.Sxf5#
- 2.Qxc4#
- 1...Sde5
- 2.Sge2#
- 2.Sxf5#
- 1...Sb6
- 2.Sge2#
- 1...c3
- 2.Sge2#
- 2.Rc4#
- 1...Se3!
- threat
- 1.Rxe7?
- threat
- 2.Sge2#
- 2.Rxc4#
- 2.Qxc4#
- 1...cxb3
- 2.Sge2#
- 2.Rc4#
- 2.Qb2#
- 2.Qc4#
- 1...cxd3
- 2.Rc4#
- 2.Qb2#
- 2.Qc4#
- 1...cxd6
- 2.Sge2#
- 2.Qxc4#
- 1...Qa6
- 2.Sge2#
- 1...Qg8
- 2.Sge2#
- 1...Ra2
- 2.Sxf5#
- 2.Rxc4#
- 2.Qxc4#
- 1...Rc5
- 2.Sge2#
- 1...Re5
- 2.Rxc4#
- 1...Bf7
- 2.Sge2#
- 1...Sf2
- 2.Rxc4#
- 2.Qxc4#
- 1...Sh2
- 2.Rxc4#
- 2.Qxc4#
- 1...Sge5
- 2.Sxf5#
- 1...Sgf6
- 2.Rxc4#
- 2.Qxc4#
- 1...Sh6
- 2.Rxc4#
- 2.Qxc4#
- 1...Sc5
- 2.Sge2#
- 2.Qxc4#
- 1...Sde5
- 2.Sge2#
- 1...Sb6
- 2.Sge2#
- 1...c3
- 2.Sge2#
- 2.Rc4#
- 1...Se3!
- threat
- 1.bxc4?
- threat
- 2.Qb2#
- 1...Kxe5
- 2.Qb2#
- 1...Sgxe5
- 2.Sxf5#
- 1...Sdxe5
- 2.Sge2#
- 1...Ra2
- 2.Rd5#
- 1...Ra3
- 2.Rd5#
- 1...Rxe5!
- threat
- 1.Sfe2+?
- Keys
- 1.Bxc4!
- threat
- 2.Qb2#
- 1...Kxe5
- 2.Qb2#
- 1...Rxe5
- 2.Qd2#
- 1...Sgxe5
- 2.Se6#
- 1...Sdxe5
- 2.Sfe2#
- 1...Ra2
- 2.Rd5#
- threat
- 1.Bxc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 10
- Sets
- R(e);N_GUARD::R1(F)
- R(e);N_GUARD::R1(F),XR(e)
- R(e);SBLOCK,XR(F)::R1(H),XP(b)
- S(d);SBLOCK,XR(F)::S(D),XP(f)
- S(i);S_CUTR(e)::R1(F)
- S(i);SBLOCK,XR(F)::S(D)
- P(b);N_GUARD,XP(B)::QAB(A)
- P(b);N_GUARD,XB(C)::QAB(A)
- Tries
- Try
- S(E);CHECK
- Vars
- K(c);P-FLIGHT,XB(C)::QAR2(A)
- Refutation
- K(c);S_FLIGHT,XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- P(b);XB(C)::R1(H)
- P(h);XP(I)::S(D)
- Q(l);::S(D)
- R(e);::S(D)
- B(g);::S(D)
- S(d);::R1(H),XP(b)
- S(d);S_CUTR(e)::S(D),XP(f)
- S(i);::S(D)
- Refutation
- S(d);XR(F)
- Try
- R(F);
- Threat
- DUALS(3)
- Vars
- Q(l);::S(D)
- R(e);::S(D)
- R(e);::R1(H),XP(b)
- S(d);S_CUTR(e)::S(D),XP(f)
- S(i);::S(D)
- Refutation
- S(d);
- Try
- R(F);XP(j)
- Threat
- DUALS(3)
- Vars
- Q(l);::S(D)
- R(e);::S(D)
- R(e);::R1(H),XP(b)
- B(g);::S(D)
- S(d);S_CUTR(e)::S(D),XP(f)
- S(i);::S(D)
- Refutation
- S(d);
- Try
- P(B);XP(b)
- Threat
- QAB(A)
- Vars
- K(c);S_FLIGHT,XR(F)::QAB(A)
- S(d);SBLOCK,XR(F)::S(D),XP(f)
- S(i);SBLOCK,XR(F)::S(D)
- R(e);N_GUARD::R1(F)
- Refutation
- R(e);XR(F)
- Try
- Actual
- B(C);XP(b)
- Threat
- QAB(A)
- Vars
- K(c);S_FLIGHT,XR(F)::QAB(A)
- R(e);SBLOCK,XR(F)::QAR2(A)
- S(d);SBLOCK,XR(F)::S(E)
- S(i);SBLOCK,XR(F)::S(E)
- R(e);N_GUARD::R1(F)
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).