MESON Chess Problem Database
Problem Display
PID: 209837 (6bK/q1r4p/5N2/1n1PNB2/R1r5/2b1k1BR/8/2nQ4 w - - 0 1)
Andersson, Sven Tore
Suomen Shakki, 1953
#2
9 + 9
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Re4
- 2.Rxe4#
- 1...Rg4
- 2.Sexg4#
- 2.Sfxg4#
- 1...Rh4
- 2.Bxh4#
- 1...R4c5
- 2.Seg4#
- 2.Sfg4#
- 2.Be1#
- 2.Bh4#
- 2.Re4#
- 1...R4c6
- 2.Seg4#
- 2.Sfg4#
- 2.Be1#
- 2.Bh4#
- 2.Re4#
- 1...Rb7
- 2.Sxc4#
- 1...Rd7
- 2.Sxc4#
- 1...Re7
- 2.Sxc4#
- 1...Rf7
- 2.Sxc4#
- 1...Rg7
- 2.Sxc4#
- 1...Bd4
- 2.Seg4#
- 2.Sfg4#
- 1...Bxd5
- 2.Sxd5#
- 1...Sa2
- 2.Qd3#
- 1...Se2
- 2.Qd3#
- 1...Sb3
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sd4
- 2.Seg4#
- 2.Sfg4#
- 1...Re4
- Tries
- 1.Sd3?
- threat
- 2.Bf2#
- 2.Be5#
- 1...Kd4
- 2.Bf2#
- 2.Be5#
- 2.Qg1#
- 1...Bxd5
- 2.Bf2#
- 1...Sxd3
- 2.Qxd3#
- 1...Se2
- 2.Bf2#
- 1...Rf4
- 2.Bf2#
- 2.Bxf4#
- 1...Rg4
- 2.Bf2#
- 2.Bf4#
- 1...Rh4
- 2.Bf2#
- 2.Bf4#
- 2.Bxh4#
- 1...Rg7
- 2.Bf2#
- 1...Be1
- 2.Bf2#
- 1...Be5
- 2.Bf2#
- 2.Bxe5#
- 1...Sd4
- 2.Sg4#
- 2.Bf2#
- 2.Bf4#
- 1...Bxf6+!
- threat
- 1.Bf4+?
- 1...Kf2
- 2.Rh2#
- 1...Kxf4!
- 1...Kf2
- 1.Rxc4?
- threat
- 2.Seg4#
- 2.Sfg4#
- 2.Be1#
- 2.Bh4#
- 2.Re4#
- 1...Rxc4
- 2.Sxc4#
- 1...Bxe5
- 2.Re4#
- 1...Bxd5
- 2.Seg4#
- 2.Sfg4#
- 2.Sxd5#
- 1...Be1
- 2.Seg4#
- 2.Sfg4#
- 2.Bxe1#
- 2.Re4#
- 1...Qa4
- 2.Seg4#
- 2.Sfg4#
- 2.Be1#
- 2.Bh4#
- 1...Rg7
- 2.Re4#
- 1...Bd4
- 2.Seg4#
- 2.Sfg4#
- 1...Se2
- 2.Sfg4#
- 2.Re4#
- 2.Qd3#
- 1...Sd4
- 2.Seg4#
- 2.Sfg4#
- 1...Sd6
- 2.Seg4#
- 2.Sfg4#
- 2.Be1#
- 2.Bh4#
- 1...h5
- 2.Be1#
- 2.Bh4#
- 2.Re4#
- 1...Qd4!
- threat
- 1.Qf3+?
- 1...Kd4
- 2.Qf2#
- 1...Kd2!
- 1...Kd4
- 1.Qxc1+?
- 1...Ke2
- 2.Bd3#
- 1...Kd4
- 2.Qg1#
- 1...Bd2!
- 1...Ke2
- 1.Qg1+?
- 1...Kd2
- 2.Qe1#
- 1...Ke2!
- 1...Kd2
- 1.Sd3?
- Keys
- 1.Se4!
- threat
- 2.Bh2#
- 1...Bxe5+
- 2.Bxe5#
- 1...Rxe4
- 2.Rxe4#
- 1...Bd2
- 2.Qxd2#
- 1...Sd3
- 2.Qxd3#
- 1...Rg7
- 2.Sxc4#
- 1...Be1
- 2.Sg4#
- 1...Se2
- 2.Qd3#
- 1...Sd4
- 2.Sg4#
- threat
- 1.Se4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- R(d);OGATE::R1(D),XR(d)
- R(d);::R(C)+B(B),XR(d)
- R(g);N_GUARD::S(F),XR(d)
- B(i);XP(E)::S(H),XB(i)
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
- Tries
- Try
- S(F);P_SPINS(H)
- Threat
- DUALS(2)
- Vars
- B(i);XP(E)::R(C)+B(B),DCHECK
- S(a);OGATE,XS(F)::QAR1(A),XS(a)
- S(a);::R(C)+B(B),DCHECK
- R(g);N_PINS(H)::R(C)+B(B),DCHECK
- B(b);N_PINS(H)::R(C)+B(B),DCHECK
- Refutation
- B(b);CHECK,XS(H)
- Try
- B(B);CHECK
- Vars
- K(c);S_FLIGHT::R(C)
- Refutation
- K(c);P_SPINR(d),S_FLIGHT,XB(B)
- Try
- R(D);XR(d)
- Threat
- DUALS(5)
- Vars
- R(g);XR(D)::S(F),XR(g)
- B(b);P_PINS(H),XS(F)::R1(D)
- R(g);::R1(D)
- Refutation
- Q(f);
- Try
- Q(A);CHECK
- Vars
- K(c);P_SPINR(d),S_FLIGHT::QAB(A)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(A);CHECK,XS(a)
- Vars
- K(c);P-FLIGHT::B(G)
- K(c);P_SPINR(d),S_FLIGHT::QAB(A)
- Refutation
- B(b);P_SPINB(b)
- Try
- Q(A);CHECK
- Vars
- K(c);S_FLIGHT::QAB1(A)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- S(H);P_SPINS(F)
- Threat
- R(C)+B(B)
- Vars
- B(b);CHECK,OGATE,XS(F)::R(C)+B(B),XB(b)
- R(d);OGATE,XS(H)::R1(D),XR(d)
- B(b);N_GUARD,N_PINS(F)::QAB1(A),XB(b)
- S(a);N_GUARD::QAR1(A),XS(a)
- R(g);N_PINS(F)::S(F),XR(d)
- B(b);N_PINS(F)::S(F)
- S(a);N_GUARD::QAR1(A)
- S(e);N_PINS(F)::S(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).