MESON Chess Problem Database
Problem Display
PID: 212389 (3r4/1Nr1R3/n3Bp2/1R1nkP2/1bp2pP1/4PP2/2KNQ3/8 w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Schach-Echo, 1973
#2
11 + 9
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxb7
- 2.Sxc4#
- 1...Rcd7
- 2.Sxc4#
- 1...Rxe7
- 2.Sxc4#
- 1...Ra8
- 2.Rxd5#
- 1...Rb8
- 2.Rxd5#
- 1...Rc8
- 2.Rxd5#
- 1...Re8
- 2.Rxd5#
- 1...Rf8
- 2.Rxd5#
- 1...Rg8
- 2.Rxd5#
- 1...Rh8
- 2.Rxd5#
- 1...Bxd2
- 2.Bd7#
- 1...Bc3
- 2.Bd7#
- 1...Ba5
- 2.Bd7#
- 1...Bc5
- 2.Sxc4#
- 1...Bd6
- 2.Rxd5#
- 1...Sc5
- 2.Sxc4#
- 1...fxe3
- 2.Qxe3#
- 1...Rxb7
- Tries
- 1.Bxd5+?
- 1...Rxe7
- 2.Sxc4#
- 1...Bxe7!
- 1...Rxe7
- 1.Bf7+?
- 1...Rxe7
- 2.Sxc4#
- 1...Bxe7!
- 1...Rxe7
- 1.Bc8+?
- 1...Rxe7
- 2.Sxc4#
- 1...Bxe7!
- 1...Rxe7
- 1.Bg8+?
- 1...Rxe7
- 2.Sxc4#
- 1...Bxe7!
- 1...Rxe7
- 1.Rc5?
- threat
- 2.Sxc4#
- 2.Bd7#
- 1...Rxb7
- 2.Sxc4#
- 1...Rxe7
- 2.Sxc4#
- 1...Bxd2
- 2.Bd7#
- 1...Bxc5
- 2.Sxc4#
- 1...Sxc5
- 2.Sxc4#
- 1...fxe3
- 2.Qxe3#
- 1...Rc6
- 2.Sxc4#
- 1...Rcd7
- 2.Sxc4#
- 2.Bxd7#
- 1...Rd6
- 2.Sxc4#
- 1...Rdd7
- 2.Sxc4#
- 2.Bxd7#
- 1...Re8
- 2.Sxc4#
- 2.Rxd5#
- 1...c3
- 2.Sc4#
- 2.Bd7#
- 1...Rxc5!
- threat
- 1.Rxc7?
- threat
- 2.Sxc4#
- 1...fxe3
- 2.Qxe3#
- 1...c3
- 2.Sc4#
- 1...Bxd2!
- threat
- 1.Qd3?
- threat
- 2.Qe4#
- 2.Qd4#
- 1...Rxb7
- 2.Sxc4#
- 1...fxe3
- 2.Qe4#
- 2.Qxe3#
- 1...Bc3
- 2.Bd7#
- 2.Qe4#
- 2.Qxc3#
- 1...Bc5
- 2.Sxc4#
- 2.Qe4#
- 1...Sc5
- 2.Sxc4#
- 2.Qd4#
- 1...cxd3+!
- threat
- 1.Qh2?
- threat
- 2.Qxf4#
- 1...Bc5
- 2.Sxc4#
- 1...Sc5
- 2.Sxc4#
- 1...Rc5!
- threat
- 1.exf4+?
- 1...Kd4
- 2.Qe4#
- 1...Kxf4!
- 1...Kd4
- 1.Bxd5+?
- Keys
- 1.Qxc4!
- threat
- 2.exf4#
- 1...Rxc4+
- 2.Sxc4#
- 1...Rxb7
- 2.Qxf4#
- 1...Bxd2
- 2.Bd7#
- 1...fxe3
- 2.f4#
- 1...Rc5
- 2.Bxd5#
- 1...Bc5
- 2.Qe4#
- 1...Sc5
- 2.Qd4#
- threat
- 1.Qxc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 2
- REMOVED MATES = 12
- Sets
- R(h);N_GUARD,XS(J)::S(B),XP(b)
- R(h);N_GUARD::S(B),XP(b)
- R(h);N_GUARD,XR(K)::S(B),XP(b)
- R(i);N_GUARD::R1(G),XS(d)
- B(a);N_GUARD,XS(B)::R(K)+B(I)
- B(a);N_GUARD::R(K)+B(I)
- B(a);N_SPINS(d),S_CUTR(h)::S(B),XP(b)
- B(a);S_CUTR(i)::R1(G),XS(d)
- S(f);N_SPINS(d),S_CUTR(h)::S(B),XP(b)
- P(c);OGATE,P_SPINP(c),XP(D)::QAR2(C),XP(c)
- Tries
- Try
- B(I);CHECK,XS(d)
- Vars
- R(h);XR(K)::S(B),XP(b)
- Refutation
- B(a);XR(K)
- Try
- B(I);CHECK
- Vars
- R(h);XR(K)::S(B),XP(b)
- Refutation
- B(a);XR(K)
- Try
- B(I);CHECK
- Vars
- R(h);XR(K)::S(B),XP(b)
- Refutation
- B(a);XR(K)
- Try
- B(I);CHECK
- Vars
- R(h);XR(K)::S(B),XP(b)
- Refutation
- B(a);XR(K)
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- R(h);XS(J)::S(B),XP(b)
- R(h);XR(K)::S(B),XP(b)
- B(a);XS(B)::R(K)+B(I)
- B(a);N_SPINS(d),XR(G)::S(B),XP(b)
- S(f);N_SPINS(d),XR(G)::S(B),XP(b)
- P(c);OGATE,P_SPINP(c),XP(D)::QAR2(C),XP(c)
- R(h);::S(B),XP(b)
- R(i);::S(B),XP(b)
- Refutation
- R(h);N_SPINS(d),XR(G)
- Try
- R(K);XR(h)
- Threat
- S(B),XP(b)
- Vars
- P(c);OGATE,P_SPINP(c),XP(D)::QAR2(C),XP(c)
- P(b);::S(B)
- Refutation
- B(a);XS(B)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- R(h);N_GUARD,XS(J)::S(B),XP(b)
- Refutation
- P(b);CHECK,XQ(C)
- Try
- Q(C);P_PINP(c)
- Threat
- QAB1(C),XP(c)
- Vars
- B(a);N_SPINS(d),S_CUTR(h)::S(B),XP(b)
- S(f);N_SPINS(d),S_CUTR(h)::S(B),XP(b)
- Refutation
- R(h);N_SPINS(d)
- Try
- P(D);CHECK,XP(c)
- Vars
- K(e);N_SPINS(d),S_FLIGHT::QAR1(C)
- Refutation
- K(e);N_SPINS(d),S_FLIGHT,XP(D)
- Try
- Actual
- Q(C);P_SPINQ(C),XP(b)
- Threat
- P(D),XP(c)
- Vars
- R(h);CHECK,XQ(C)::S(B),XR(h)
- R(h);N_PINQ(C),XS(J)::QAB1(C),XP(c)
- B(a);N_GUARD,XS(B)::R(K)+B(I)
- P(c);OGATE,XP(D)::P(E)
- R(h);N_GUARD,N_SPINS(d),S_CUTB(a)::R(K)+B(I),XS(d)
- B(a);N_PINQ(C),N_SPINS(d)::QAR1(C)
- S(f);N_PINQ(C),N_SPINS(d)::QAB1(C)
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).