MESON Chess Problem Database
Problem Display
PID: 87559 (3b2b1/5B2/K2pr3/2pr1p2/n1k3qR/PNB2Q2/P1NR4/8 w - - 0 1)
Katsnelson, Leonard Ilich
Problemista, 1965
#2
10 + 10
| 6490 | yacpdb | 2009 |
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Qd3#
- 1...Rxd2
- 2.Sxd2#
- 1...Rd3
- 2.Qxd3#
- 1...Rde5
- 2.Qd3#
- 1...Re1
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Rf6
- 2.Qd3#
- 1...Rg6
- 2.Qd3#
- 1...Rh6
- 2.Qd3#
- 1...Re7
- 2.Qd3#
- 1...Re8
- 2.Qd3#
- 1...Bxh4
- 2.Sa5#
- 1...Ba5
- 2.Sxa5#
- 1...Bg5
- 2.Sa5#
- 1...Bf6
- 2.Sa5#
- 1...Be7
- 2.Sa5#
- 1...Sb6
- 2.Sa5#
- 1...Qd4
- Tries
- 1.Ba1?
- threat
- 2.Qxd5#
- 1...Rxd2
- 2.Sxd2#
- 1...Qd4
- 2.Qd3#
- 1...Qe4
- 2.Se3#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Se3#
- 1...Rde5
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb6
- 2.Sa5#
- 2.Qc3#
- 1...Sb2!
- threat
- 1.Bb2?
- threat
- 2.Qxd5#
- 1...Rxd2
- 2.Sxd2#
- 1...Qd4
- 2.Qd3#
- 1...Qe4
- 2.Se3#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Se3#
- 1...Rde5
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb6
- 2.Sa5#
- 2.Qc3#
- 1...Sxb2!
- threat
- 1.Bb4?
- threat
- 2.Qxd5#
- 1...Rxd2
- 2.Sxd2#
- 1...Qd4
- 2.Qd3#
- 1...Qe4
- 2.Se3#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Se3#
- 1...Rde5
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb6
- 2.Sa5#
- 2.Qc3#
- 1...cxb4!
- threat
- 1.Bf6?
- threat
- 2.Qxd5#
- 1...Rxd2
- 2.Sxd2#
- 1...Rxf6
- 2.Qd3#
- 1...Bxf6
- 2.Sa5#
- 1...Qd4
- 2.Qd3#
- 1...Qe4
- 2.Se3#
- 1...Rd3
- 2.Qxd3#
- 1...Rde5
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb6
- 2.Sa5#
- 2.Qc3#
- 1...Rd4!
- threat
- 1.Bg7?
- threat
- 2.Qxd5#
- 1...Rxd2
- 2.Sxd2#
- 1...Qd4
- 2.Qd3#
- 1...Qe4
- 2.Se3#
- 1...Rd3
- 2.Qxd3#
- 1...Rde5
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Rf6
- 2.Qd3#
- 1...Bf6
- 2.Sa5#
- 1...Sc3
- 2.Qxc3#
- 1...Sb6
- 2.Sa5#
- 2.Qc3#
- 1...Rd4!
- threat
- 1.Bh8?
- threat
- 2.Qxd5#
- 1...Rxd2
- 2.Sxd2#
- 1...Qd4
- 2.Qd3#
- 1...Qe4
- 2.Se3#
- 1...Rd3
- 2.Qxd3#
- 1...Rde5
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Rf6
- 2.Qd3#
- 1...Bf6
- 2.Sa5#
- 1...Sc3
- 2.Qxc3#
- 1...Sb6
- 2.Sa5#
- 2.Qc3#
- 1...Rd4!
- threat
- 1.Rd3?
- threat
- 2.Sd2#
- 2.Qxd5#
- 1...Sxc3
- 2.Sd2#
- 2.Rxc3#
- 1...Re3
- 2.Qxd5#
- 1...Rd4
- 2.Sd2#
- 1...Qd4
- 2.Sd2#
- 1...Qe4
- 2.Sd2#
- 1...Rde5
- 2.Sd2#
- 1...Re2
- 2.Qxd5#
- 1...Re4
- 2.Sd2#
- 1...Ree5
- 2.Sd2#
- 1...Bg5
- 2.Sa5#
- 2.Qxd5#
- 1...Sb6
- 2.Sd2#
- 2.Sa5#
- 1...Rxd3!
- threat
- 1.Rxd5?
- threat
- 2.Sd2#
- 2.Qd3#
- 1...Qe4
- 2.Qd3#
- 1...Qd4
- 2.Sd2#
- 1...Re2
- 2.Rd4#
- 2.Rxc5#
- 2.Qd3#
- 1...Bg5
- 2.Sa5#
- 2.Qd3#
- 1...Sb2
- 2.Sd2#
- 1...Re3!
- threat
- 1.Ba1?
- Keys
- 1.Ba5!
- threat
- 2.Qxd5#
- 1...Rxd2
- 2.Sxd2#
- 1...Bxa5
- 2.Sxa5#
- 1...Qd4
- 2.Qd3#
- 1...Qe4
- 2.Se3#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Se3#
- 1...Rde5
- 2.Qd3#
- 1...Re4
- 2.Qd3#
- 1...Ree5
- 2.Qd3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb6
- 2.Qc3#
- threat
- 1.Ba5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- Q(c);S_CUTR(e)::QAB1(G)
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- B(i);N_GUARD,N_SPINQ(c),XR(H)::S(E)
- B(i);N_GUARD::S(E),XB(i)
- B(i);N_GUARD::S(E)
- S(a);S_CUTB(i)::S(E)
- Tries
- Try
- B(F);
- Threat
- QAB1(G),XR(e)
- Vars
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- Q(c);S_CUTR(e)::QAB1(G)
- Q(c);S_CUTR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_SPINQ(c),P_SPINR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- S(a);
- Try
- B(F);
- Threat
- QAB1(G),XR(e)
- Vars
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- Q(c);S_CUTR(e)::QAB1(G)
- Q(c);S_CUTR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_SPINQ(c),P_SPINR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- S(a);XB(F)
- Try
- B(F);
- Threat
- QAB1(G),XR(e)
- Vars
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- Q(c);S_CUTR(e)::QAB1(G)
- Q(c);S_CUTR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_SPINQ(c),P_SPINR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- P(d);XB(F)
- Try
- B(F);
- Threat
- QAB1(G),XR(e)
- Vars
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- R(h);P_SPINR(e),XB(F)::QAB1(G)
- B(i);N_GUARD,XB(F)::S(E)
- Q(c);S_CUTR(e)::QAB1(G)
- Q(c);S_CUTR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- R(e);N_SPINQ(c),P_SPINR(h)
- Try
- B(F);
- Threat
- QAB1(G),XR(e)
- Vars
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- Q(c);S_CUTR(e)::QAB1(G)
- Q(c);S_CUTR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- B(i);N_GUARD::S(E)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- R(e);N_SPINQ(c),P_SPINR(h)
- Try
- B(F);
- Threat
- QAB1(G),XR(e)
- Vars
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- Q(c);S_CUTR(e)::QAB1(G)
- Q(c);S_CUTR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- B(i);N_GUARD::S(E)
- S(a);N_GUARD::QAR1(G),XS(a)
- Refutation
- R(e);N_SPINQ(c),P_SPINR(h)
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- R(h);P_SPINR(e)::QAB1(G),XR(e)
- R(e);N_SPINQ(c),P_SPINR(h)::S(E)
- Q(c);::S(E)
- R(e);P_SPINR(h)::S(E)
- R(h);N_SPINQ(c),P_SPINR(e)::S(E)
- R(h);P_SPINR(e)::S(E)
- Refutation
- R(e);P_SPINR(h),XR(C)
- Try
- R(C);XR(e)
- Threat
- DUALS(2)
- Vars
- Q(c);::QAB1(G)
- Q(c);::S(E)
- S(a);::S(E)
- Refutation
- R(h);
- Try
- Actual
- B(F);
- Threat
- QAB1(G),XR(e)
- Vars
- R(e);P_SPINR(h),XR(C)::S(E),XR(e)
- B(i);XB(F)::S(E),XB(i)
- Q(c);S_CUTR(e)::QAB1(G)
- Q(c);S_CUTR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G),XR(e)
- R(e);N_SPINQ(c),P_SPINR(h)::S(B)
- R(e);N_GUARD,P_SPINR(h)::QAB1(G)
- R(h);N_SPINQ(c),P_SPINR(e)::QAB1(G)
- R(h);P_SPINR(e)::QAB1(G)
- S(a);N_GUARD::QAR1(G),XS(a)
- S(a);N_GUARD::QAR1(G)
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).