MESON Chess Problem Database
Problem Display
PID: 249772 (2Q5/8/2Rbr2p/3k2nR/7N/2P5/7B/KB6 w - - 0 1)
Sandin, Svante
Stella Polaris, 1969
#2
8 + 5
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Rxd6#
- 1...Re2
- 2.Rxd6#
- 1...Re3
- 2.Rxd6#
- 1...Re4
- 2.Rxd6#
- 1...Re7
- 2.Rxd6#
- 1...Re8
- 2.Rxd6#
- 1...Bxh2
- 2.Qxe6#
- 1...Ba3
- 2.Qxe6#
- 1...Bg3
- 2.Qxe6#
- 1...Bb4
- 2.Qxe6#
- 1...Bf4
- 2.Qxe6#
- 1...Bc5
- 2.Rxc5#
- 2.Qxe6#
- 1...Bc7
- 2.Qxe6#
- 1...Be7
- 2.Qxe6#
- 1...Bb8
- 2.Rc5#
- 2.Qxe6#
- 1...Bf8
- 2.Qxe6#
- 1...Re1
- Tries
- 1.Sf3?
- threat
- 2.c4#
- 1...Bc5
- 2.Rxc5#
- 2.Qxe6#
- 1...Bc7
- 2.Qxe6#
- 1...Re4
- 2.Rxd6#
- 1...Be5!
- threat
- 1.Sf5?
- threat
- 2.c4#
- 1...Bxh2
- 2.Rc5#
- 1...Bg3
- 2.Rc5#
- 1...Bf4
- 2.Rc5#
- 1...Bc5
- 2.Rxc5#
- 1...Re4
- 2.Rxd6#
- 1...Be5
- 2.Se3#
- 2.Rc5#
- 1...Bc7!
- threat
- 1.Be4+?
- 1...Rxe4
- 2.Rxd6#
- 1...Kxe4!
- 1...Rxe4
- 1.Rc4?
- threat
- 2.Rd4#
- 2.Qc6#
- 1...Bxh2
- 2.Qc5#
- 1...Bg3
- 2.Qc5#
- 1...Bf4
- 2.Qc5#
- 1...Bc5
- 2.Rxc5#
- 2.Qxc5#
- 1...Be5
- 2.Qc5#
- 1...Re5
- 2.Rd4#
- 1...Re1
- 2.Rd4#
- 1...Re2
- 2.Rd4#
- 1...Re3
- 2.Rd4#
- 1...Re4
- 2.Bxe4#
- 1...Rf6
- 2.Be4#
- 2.Rd4#
- 1...Rg6
- 2.Be4#
- 2.Rd4#
- 1...Re7
- 2.Rd4#
- 1...Re8
- 2.Rd4#
- 1...Ba3
- 2.Rd4#
- 1...Bb4
- 2.Rd4#
- 1...Be7
- 2.Rd4#
- 1...Bb8
- 2.Rd4#
- 2.Rc5#
- 2.Qc5#
- 1...Bf8
- 2.Rd4#
- 1...Bc7!
- threat
- 1.Sf3?
- Keys
- 1.Sg2!
- 1...Bxh2
- 2.Qxe6#
- 1...Bg3
- 2.Qxe6#
- 1...Bf4
- 2.Qxe6#
- 1...Bc5
- 2.Rxc5#
- 2.Qxe6#
- 1...Bc7
- 2.Qxe6#
- 1...Re1
- 2.Rxd6#
- 1...Re2
- 2.Rxd6#
- 1...Re3
- 2.Sxe3#
- 2.Rxd6#
- 1...Re4
- 2.Rxd6#
- 1...Re5
- 2.Sf4#
- 1...Rf6
- 2.Se3#
- 1...Rg6
- 2.Se3#
- 1...Re7
- 2.Rxd6#
- 1...Re8
- 2.Rxd6#
- 1...Ba3
- 2.Qxe6#
- 1...Bb4
- 2.Qxe6#
- 1...Be5
- 2.Se3#
- 1...Be7
- 2.Qxe6#
- 1...Bb8
- 2.Rc5#
- 2.Qxe6#
- 1...Bf8
- 2.Qxe6#
- 1...Bxh2
- 1.Sg2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- R(d);N_GUARD,P_PINB(B)::R1(G),XB(c)
- R(d);N_GUARD::R1(G),XB(c)
- B(c);XB(C)::QAB1(H),XR(d)
- B(c);::QAB1(H),XR(d)
- Tries
- Try
- S(E);
- Threat
- P(D)
- Vars
- B(c);::QAB1(H),XR(d)
- R(d);N_GUARD::R1(G),XB(c)
- Refutation
- B(c);N_SPINS(b),P_PINP(D)
- Try
- S(E);N_PINS(b)
- Threat
- P(D)
- Vars
- B(c);N_GUARD,XB(C)::R1(G)
- B(c);N_GUARD::R1(G)
- B(c);N_GUARD::R1(G),XB(c)
- R(d);N_GUARD::R1(G),XB(c)
- Refutation
- B(c);
- Try
- B(B);CHECK
- Vars
- R(d);SBLOCK,XB(B)::R1(G),XB(c)
- Refutation
- K(a);N_SPINS(b),S_FLIGHT,XB(B)
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD,XB(C)::QAR1(H)
- B(c);N_GUARD::QAR1(H)
- B(c);N_GUARD,N_SPINS(b),P_PINP(D)::QAR1(H)
- R(d);N_SPINS(b)::R1(G)
- R(d);P_PINB(B)::R1(G)
- R(d);::R1(G)
- R(d);N_GUARD::B(B),XR(d)
- B(c);::R1(G)
- Refutation
- B(c);
- Try
- Actual
- S(E);
- Vars
- B(c);XB(C)::QAB1(H),XR(d)
- B(c);::QAB1(H),XR(d)
- R(d);N_GUARD,P_PINB(B)::R1(G),XB(c)
- R(d);N_GUARD::R1(G),XB(c)
- R(d);N_SPINS(b),SBLOCK,S_CUTB(c)::S(E)
- R(d);N_GUARD::S(E)
- B(c);N_SPINS(b),P_PINP(D),S_CUTR(d)::S(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).