MESON Chess Problem Database
Problem Display
PID: 22131 (1n6/BBp4K/2r2P2/pQ1n1p1N/Rb1pkP2/6P1/4P3/1b2RN2 w - - 0 1)
Larsen, Karl Adolf Koefoed
Comm., Australasian (The), 1924
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Bxd5#
- 2.Qxd5#
- 1...Rc2
- 2.Bxd5#
- 2.Qd3#
- 2.Qxd5#
- 1...Rc3
- 2.Bxd5#
- 2.Qxd5#
- 1...Rc4
- 2.Bxd5#
- 2.Qxd5#
- 1...Rc5
- 2.Qe8#
- 1...Ra6
- 2.Bxd5#
- 2.Qxd5#
- 1...Rb6
- 2.Bxd5#
- 2.Qxd5#
- 1...Re6
- 2.Bxd5#
- 2.Qxd5#
- 1...Rxf6
- 2.Sxf6#
- 2.Bxd5#
- 2.Qxd5#
- 1...Ba2
- 2.Qd3#
- 1...Bd3
- 2.Qxd3#
- 1...Bxe1
- 2.Rxd4#
- 1...Bd2
- 2.Rxd4#
- 1...Ba3
- 2.Rxd4#
- 1...Bc3
- 2.Qxb1#
- 1...Bc5
- 2.Qxb1#
- 1...Bd6
- 2.Rxd4#
- 1...Be7
- 2.Rxd4#
- 1...Bf8
- 2.Rxd4#
- 1...Sc3
- 2.Qe5#
- 1...Se3
- 2.Qe5#
- 1...Sb6
- 2.Qe5#
- 1...Sxf6+
- 2.Sxf6#
- 1...Se7
- 2.Qe5#
- 1...d3
- 2.Sd2#
- 1...Rc1
- Tries
- 1.Bxc6?
- threat
- 2.Bxd5#
- 2.Qxd5#
- 1...Ba2
- 2.Qd3#
- 1...Bc5
- 2.Qxb1#
- 1...Sxc6!
- threat
- 1.Rxb1?
- threat
- 2.Qd3#
- 1...Sxf6+
- 2.Sxf6#
- 1...Rc3
- 2.Bxd5#
- 2.Qxd5#
- 1...Rc4
- 2.Bxd5#
- 2.Qxd5#
- 1...Sc3
- 2.Qe5#
- 1...Se3
- 2.Qe5#
- 1...Sb6
- 2.Qe5#
- 1...Se7
- 2.Qe5#
- 1...d3
- 2.Sd2#
- 2.Qxd3#
- 1...Sxf4!
- threat
- 1.Rxb4?
- threat
- 2.Rxd4#
- 1...Sxf6+
- 2.Sxf6#
- 1...Sxb4
- 2.Qe5#
- 1...Rc4
- 2.Bxd5#
- 2.Qe8#
- 2.Qxd5#
- 1...Rc5
- 2.Qe8#
- 1...Rb6
- 2.Bxd5#
- 2.Qxd5#
- 1...Sb6
- 2.Qe5#
- 1...axb4!
- threat
- 1.Qxc6?
- threat
- 2.Qxd5#
- 2.Qe6#
- 1...Ba2
- 2.Qe6#
- 1...Bd6
- 2.Rxd4#
- 2.Qxd5#
- 1...Sd7
- 2.Qxd5#
- 1...Sxc6!
- threat
- 1.Bxc6?
- Keys
- 1.Rd1!
- threat
- 2.Rxd4#
- 1...Sxf6+
- 2.Sxf6#
- 1...Rc4
- 2.Bxd5#
- 2.Qxd5#
- 1...Rc5
- 2.Qe8#
- 1...Rb6
- 2.Bxd5#
- 2.Qxd5#
- 1...Bd3
- 2.Qxd3#
- 1...Bd2
- 2.Rxd4#
- 1...Bc3
- 2.Qxb1#
- 1...Bc5
- 2.Qxb1#
- 1...Sb6
- 2.Qe5#
- 1...d3
- 2.Sd2#
- threat
- 1.Rd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- R(h);OGATE,P_SPINS(f)::QAR(G)
- B(a);N_GUARD::QAB1(G)
- B(a);N_GUARD::QAB1(G),XB(a)
- B(b);OGATE,P_SPINP(c),XR(A)::R1(E),XP(c)
- B(b);OGATE,P_SPINP(c)::R1(E),XP(c)
- B(b);OGATE,P_SPINP(c)::QAB(G),XB(a)
- S(f);OGATE,P_SPINR(h)::QAR1(G)
- S(f);CHECK,P_SPINR(h),XP(I)::S(H),XS(f)
- P(c);P_SPINB(b)::S(B)
- Tries
- Try
- B(K);P_PINS(f),XR(h)
- Threat
- DUALS(2)
- Vars
- B(a);N_GUARD::QAB1(G)
- B(b);OGATE,P_SPINP(c)::QAB(G),XB(a)
- Refutation
- S(j);N_SPINS(f),XB(K)
- Try
- R(A);XB(a)
- Threat
- QAB1(G)
- Vars
- S(f);CHECK,P_SPINR(h),XP(I)::S(H),XS(f)
- S(f);OGATE,P_SPINR(h)::QAR1(G)
- Refutation
- S(f);P_SPINR(h),XP(F)
- Try
- R(E);P_PINP(c),XB(b)
- Threat
- R1(E),XP(c)
- Vars
- S(f);CHECK,P_SPINR(h),XP(I)::S(H),XS(f)
- S(f);N_SPINP(c),OGATE,P_SPINR(h),XR(E)::QAR1(G)
- R(h);OGATE,P_SPINS(f)::QAR(G)
- S(f);OGATE,P_SPINR(h)::QAR1(G)
- Refutation
- P(e);N_SPINP(c),XR(E)
- Try
- Q(G);P_PINS(f),XR(h)
- Threat
- DUALS(2)
- Vars
- B(a);::QAR2(G)
- S(j);::QAB1(G),XS(f)
- Refutation
- S(j);N_SPINS(f),XQ(G)
- Try
- Actual
- R(A);
- Threat
- R1(A),XP(c)
- Vars
- S(f);CHECK,P_SPINR(h),XP(I)::S(H),XS(f)
- R(h);OGATE,P_SPINS(f)::QAR(G)
- B(a);N_GUARD::QAB1(G),XB(a)
- B(b);OGATE,P_SPINP(c)::R1(E),XP(c)
- B(b);OGATE,P_SPINP(c)::QAB(G),XB(a)
- S(f);OGATE,P_SPINR(h)::QAR1(G)
- P(c);P_SPINB(b)::S(B)
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).