MESON Chess Problem Database
Problem Display
PID: 250859 (2rb4/1N2p3/B2Rp1K1/Pp1NP1B1/2kPQ1n1/R7/P7/2rbn3 w - - 0 1)
Keeney, Palmer Gunkel
Jerusalem Post, 1951
(First published on Fri Feb 2 1951)
#2
12 + 10
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rc3#
- 1...Rb1
- 2.Rc3#
- 1...Rc2
- 2.Ra4#
- 1...Rc3
- 2.Rxc3#
- 1...Rc5
- 2.dxc5#
- 1...Rc6
- 2.Rxc6#
- 1...Ra8
- 2.Rc6#
- 1...Rb8
- 2.Rc6#
- 1...Bc2
- 2.Rc3#
- 1...Be2
- 2.Ra4#
- 1...Bb3
- 2.axb3#
- 1...Bf3
- 2.Ra4#
- 1...Ba4
- 2.Rxa4#
- 1...Bxa5
- 2.Sxa5#
- 1...Bc7
- 2.Rc6#
- 1...Sc2
- 2.Rc3#
- 2.Qd3#
- 1...Sg2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sf3
- 2.Qd3#
- 1...Sxe5+
- 2.dxe5#
- 1...exd6
- 2.Sxd6#
- 1...Ra1
- Tries
- 1.Se3+?
- 1...Sxe3
- 2.d5#
- 1...Kb4!
- 1...Sxe3
- 1.Bxc1?
- threat
- 2.Rc3#
- 1...Sxe5+
- 2.dxe5#
- 1...Bxa5
- 2.Sxa5#
- 1...Bb3
- 2.axb3#
- 1...exd5!
- threat
- 1.Rb3?
- threat
- 2.Bxb5#
- 2.Rb4#
- 1...Sxe5+
- 2.dxe5#
- 1...Bxa5
- 2.Sxa5#
- 2.Bxb5#
- 1...exd5
- 2.Bxb5#
- 2.Qxd5#
- 1...Rb1
- 2.Bxb5#
- 2.Rc3#
- 1...Rc5
- 2.Rb4#
- 2.dxc5#
- 1...Sc2
- 2.Bxb5#
- 2.Rc3#
- 2.Qd3#
- 1...Sd3
- 2.Bxb5#
- 2.Qxd3#
- 1...Bxb3!
- threat
- 1.Qe2+?
- 1...Kxd4
- 2.Sxe7#
- 1...Sd3
- 2.Qxd3#
- 1...Bxe2!
- 1...Kxd4
- 1.Se3+?
- Keys
- 1.Bd2!
- 1...Sxe5+
- 2.dxe5#
- 1...Bxa5
- 2.Sxa5#
- 1...exd5
- 2.Qxd5#
- 1...exd6
- 2.Sxd6#
- 1...Ra1
- 2.Rc3#
- 1...Rb1
- 2.Rc3#
- 1...Rc2
- 2.Ra4#
- 1...Rc3
- 2.Rxc3#
- 1...Rc5
- 2.dxc5#
- 1...Rc6
- 2.Rxc6#
- 1...Rc7
- 2.Sb6#
- 1...Ra8
- 2.Rc6#
- 1...Rb8
- 2.Rc6#
- 1...Bc2
- 2.Rc3#
- 1...Be2
- 2.Ra4#
- 1...Bb3
- 2.axb3#
- 1...Bf3
- 2.Ra4#
- 1...Ba4
- 2.Rxa4#
- 1...Bb6
- 2.Sxb6#
- 1...Bc7
- 2.Rc6#
- 1...Sc2
- 2.Rc3#
- 2.Qd3#
- 1...Sg2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sf3
- 2.Qd3#
- 1...Sf2
- 2.Se3#
- 1...Sh2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sf6
- 2.Se3#
- 1...Sh6
- 2.Se3#
- 1...Sxe5+
- 1.Bd2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::R1(B)
- R(a);S_CUTB(b)::R(B)
- R(a);N_GUARD::R1(B),XR(a)
- R(i);OGATE::QAR(D)+P(C),XR(i)
- R(i);N_GUARD::R(J),XR(i)
- R(i);N_GUARD::R(J)
- B(b);P_PINQ(D),S_CUTR(a)::R1(B)
- B(b);N_GUARD::R(B)
- B(b);OGATE::P(A),XB(b)
- B(b);N_GUARD::R(B),XB(b)
- B(j);XP(E)::S(L),XB(j)
- B(j);S_CUTR(i)::R(J)
- S(c);N_GUARD::QAB1(D)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(e);CHECK,OGATE,XP(G)::QAR(D)+P(C),XS(e)
- P(h);XR(J)::S(L),XP(h)
- Tries
- Try
- S(F);CHECK
- Vars
- S(e);XS(F)::QAR(D)+P(C)
- Refutation
- K(d);N_SPINP(f),P-FLIGHT
- Try
- B(H);XR(a)
- Threat
- R1(B)
- Vars
- S(e);CHECK,OGATE,XP(G)::QAR(D)+P(C),XS(e)
- B(j);XP(E)::S(L),XB(j)
- B(b);OGATE::P(A),XB(b)
- Refutation
- P(g);XS(F)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- S(e);CHECK,OGATE,XP(G)::QAR(D)+P(C),XS(e)
- Refutation
- B(b);XR(B)
- Try
- Q(D);CHECK
- Vars
- K(d);N_GUARD,N_SPINP(f),P-FLIGHT,S_CUTB(b),S_CUTS(c),XP(C)::R(J)+S(F),XP(h)
- S(c);N_GUARD,P_SPINS(c)::QAB1(D),XS(c)
- Refutation
- B(b);XQ(D)
- Try
- Actual
- B(H);
- Vars
- S(e);CHECK,OGATE,XP(G)::QAR(D)+P(C),XS(e)
- B(j);XP(E)::S(L),XB(j)
- P(g);OGATE,XS(F)::QAB1(D),XP(g)
- P(h);XR(J)::S(L),XP(h)
- R(a);N_GUARD::R1(B)
- R(a);S_CUTB(b)::R(B)
- R(a);N_GUARD::R1(B),XR(a)
- R(i);OGATE::QAR(D)+P(C),XR(i)
- R(i);N_GUARD::R(J),XR(i)
- R(i);S_CUTB(j)::S(F)
- R(i);N_GUARD::R(J)
- B(b);P_PINQ(D),S_CUTR(a)::R1(B)
- B(b);N_GUARD::R(B)
- B(b);OGATE::P(A),XB(b)
- B(b);N_GUARD::R(B),XB(b)
- B(j);N_GUARD::S(F),XB(j)
- B(j);S_CUTR(i)::R(J)
- S(c);N_GUARD::QAB1(D)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(e);N_GUARD::S(F)
- S(e);N_GUARD::S(F),XS(e)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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