MESON Chess Problem Database
Problem Display
PID: 51172 (8/3pN3/1p1r1p2/1P3p2/1Q2B2n/3Pk2p/Rp4nB/b2R1K2 w - - 0 1)
Watson, George
Manchester Guardian, 1952
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Rxd3
- 2.Rxd3#
- 1...Rd4
- 2.Qd2#
- 1...Rd5
- 2.Sxd5#
- 1...Rc6
- 2.Sd5#
- 1...Re6
- 2.Sd5#
- 1...Se1
- 2.Rxe1#
- 1...Sf4
- 2.Bg1#
- 1...Sf3
- 2.Sxf5#
- 1...Sg6
- 2.Sxf5#
- 1...b1Q
- 2.Re2#
- 1...b1S
- 2.Re2#
- 1...b1B
- 2.Re2#
- 1...b1R
- 2.Re2#
- 1...fxe4
- 2.Qxe4#
- 1...f4
- 2.Bg1#
- 1...Rxd3
- Tries
- 1.Bg3?
- 1...Rxd3
- 2.Rxd3#
- 1...fxe4
- 2.Qxe4#
- 1...b1Q
- 2.Re2#
- 1...b1S
- 2.Re2#
- 1...b1B
- 2.Re2#
- 1...b1R
- 2.Re2#
- 1...Rd5
- 2.Sxd5#
- 1...Rd4
- 2.Qd2#
- 1...Rc6
- 2.Sd5#
- 1...Re6
- 2.Sd5#
- 1...Se1
- 2.Rxe1#
- 1...Sf4
- 2.Bf2#
- 1...Sf3
- 2.Sxf5#
- 1...Sg6
- 2.Sxf5#
- 1...f4
- 2.Bf2#
- 1...h2!
- 1...Rxd3
- 1.Be5?
- threat
- 2.Qd2#
- 1...Rxd3
- 2.Rxd3#
- 1...fxe4
- 2.Qxe4#
- 1...b1S
- 2.Re2#
- 1...Sf3
- 2.Sxf5#
- 1...fxe5!
- threat
- 1.Bxd6?
- threat
- 2.Sd5#
- 1...fxe4
- 2.Qxe4#
- 1...Sf4!
- threat
- 1.Bd5?
- threat
- 2.Bg1#
- 1...Sf3
- 2.Sxf5#
- 1...Rxd5!
- threat
- 1.Rxb2?
- threat
- 2.Re2#
- 1...fxe4
- 2.Qxe4#
- 1...Sf4
- 2.Bg1#
- 1...Bxb2!
- threat
- 1.Ra4?
- threat
- 2.Qd2#
- 1...Rxd3
- 2.Rxd3#
- 1...fxe4
- 2.Qxe4#
- 1...Sf3
- 2.Sxf5#
- 1...b1S!
- threat
- 1.Qc5+?
- 1...Rd4
- 2.Sd5#
- 1...bxc5!
- 1...Rd4
- 1.Qxd6?
- threat
- 2.Bg1#
- 2.Qxb6#
- 1...b1Q
- 2.Bg1#
- 2.Re2#
- 1...b1S
- 2.Bg1#
- 2.Re2#
- 1...b1B
- 2.Bg1#
- 2.Re2#
- 1...b1R
- 2.Bg1#
- 2.Re2#
- 1...Sf3
- 2.Sxf5#
- 1...fxe4!
- threat
- 1.Bg3?
- Keys
- 1.Qc3!
- 1...Rxd3
- 2.Qxd3#
- 1...fxe4
- 2.d4#
- 1...b1Q
- 2.Re2#
- 1...b1S
- 2.Re2#
- 1...b1B
- 2.Re2#
- 1...b1R
- 2.Re2#
- 1...Rd4
- 2.Qd2#
- 1...Rd5
- 2.Sxd5#
- 1...Rc6
- 2.Sd5#
- 1...Re6
- 2.Sd5#
- 1...Se1
- 2.Rxe1#
- 1...Sf4
- 2.Bg1#
- 1...Sf3
- 2.Sxf5#
- 1...Sg6
- 2.Sxf5#
- 1...f4
- 2.Bg1#
- 1...Rxd3
- 1.Qc3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(i);OGATE,XP(E)::R1(A),XR(i)
- R(i);SBLOCK::QAB1(F)
- R(i);N_GUARD::S(I),XR(i)
- R(i);N_GUARD::S(I)
- S(c);N_GUARD::R(A),XS(c)
- S(c);SBLOCK::B(D)
- S(f);N_GUARD::S(I),XP(g)
- P(b);OGATE,P_PINR(A)::R1(C)
- P(b);OGATE::R1(C)
- P(g);OGATE,XB(G)::QAR1(F),XP(g)
- P(g);SBLOCK::B(D)
- Tries
- Try
- B(D);
- Vars
- R(i);OGATE,XP(E)::R1(A),XR(i)
- P(g);OGATE,XB(G)::QAR1(F),XP(g)
- P(b);OGATE,P_PINR(A)::R1(C)
- P(b);OGATE::R1(C)
- R(i);N_GUARD::S(I),XR(i)
- R(i);SBLOCK::QAB1(F)
- R(i);N_GUARD::S(I)
- S(c);N_GUARD::R(A),XS(c)
- S(c);SBLOCK::B(D)
- S(f);N_GUARD::S(I),XP(g)
- P(g);SBLOCK::B(D)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- QAB1(F)
- Vars
- R(i);OGATE,XP(E)::R1(A),XR(i)
- P(g);OGATE,XB(G)::QAR1(F),XP(g)
- P(b);OGATE::R1(C)
- S(f);N_GUARD::S(I),XP(g)
- Refutation
- P(j);XB(D)
- Try
- B(D);XR(i)
- Threat
- S(I)
- Vars
- P(g);OGATE,XB(G)::QAR1(F),XP(g)
- Refutation
- S(c);
- Try
- B(G);
- Threat
- B(D)
- Vars
- S(f);N_GUARD::S(I),XP(g)
- Refutation
- R(i);XB(G)
- Try
- R(C);XP(b)
- Threat
- R1(C)
- Vars
- P(g);OGATE,XB(G)::QAR1(F),XP(g)
- S(c);SBLOCK::B(D)
- Refutation
- B(a);XR(C)
- Try
- R(C);
- Threat
- QAB1(F)
- Vars
- R(i);OGATE,XP(E)::R1(A),XR(i)
- P(g);OGATE,XB(G)::QAR1(F),XP(g)
- S(f);N_GUARD::S(I),XP(g)
- Refutation
- P(b);
- Try
- Q(F);CHECK
- Vars
- R(i);P_SPINR(i)::S(I)
- Refutation
- P(h);XQ(F)
- Try
- Q(F);XR(i)
- Threat
- DUALS(2)
- Vars
- S(f);N_GUARD::S(I),XP(g)
- Refutation
- P(g);XB(G)
- Try
- Actual
- Q(F);
- Vars
- R(i);OGATE,P_SPINR(i),XP(E)::QAR1(F),XR(i)
- P(g);SBLOCK,XB(G)::QAR(F)+P(E)
- P(b);OGATE,P_PINR(A)::R1(C)
- P(b);OGATE::R1(C)
- R(i);SBLOCK::QAB1(F)
- R(i);N_GUARD::S(I),XR(i)
- R(i);N_GUARD::S(I)
- S(c);N_GUARD::R(A),XS(c)
- S(c);SBLOCK::B(D)
- S(f);N_GUARD::S(I),XP(g)
- P(g);SBLOCK::B(D)
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).