MESON Chess Problem Database
Problem Display
PID: 83683 (3B2RN/2pK4/4p1pn/R1N1kp2/2P4n/3bP2B/3P3r/5rQ1 w - - 0 1)
Ellerman, Arnoldo
Die Schwalbe, 1964
#2
11 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qxa1#
- 1...Rff2
- 2.Qa1#
- 1...Rf3
- 2.Qa1#
- 1...Bb1
- 2.d4#
- 1...Bc2
- 2.d4#
- 1...Be2
- 2.d4#
- 1...Be4
- 2.Sd3#
- 2.d4#
- 1...Sg2
- 2.Sxg6#
- 1...Sf3
- 2.Sxg6#
- 1...Sg4
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sxg8
- 2.Sf7#
- 1...Ra1
- Tries
- 1.Sxe6+?
- 1...Ke4
- 2.Sg5#
- 1...c5!
- 1...Ke4
- 1.Bg2?
- threat
- 2.Sxd3#
- 1...Bxc4
- 2.Sd3#
- 2.d4#
- 1...Sxg2
- 2.Sxg6#
- 1...Rf3
- 2.Qa1#
- 1...Bb1
- 2.Sd3#
- 2.d4#
- 1...Bc2
- 2.Sd3#
- 2.d4#
- 1...Be2
- 2.Sd3#
- 2.d4#
- 1...Be4
- 2.Sd3#
- 2.d4#
- 1...Sf3
- 2.Sxg6#
- 1...Rxg2!
- threat
- 1.Rxg6?
- threat
- 2.Bf6#
- 2.Bxc7#
- 2.Rxe6#
- 1...Sxg6
- 2.Sxg6#
- 1...Sg4
- 2.Sf7#
- 2.Bxc7#
- 2.Rxe6#
- 1...Sf7
- 2.Sxf7#
- 2.Bf6#
- 2.Rxe6#
- 1...Sg8
- 2.Sf7#
- 2.Bxc7#
- 2.Rxe6#
- 1...c6
- 2.Bf6#
- 2.Bc7#
- 2.Rxe6#
- 1...Bxc4!
- threat
- 1.Rf8?
- threat
- 2.Bf6#
- 2.Bxc7#
- 1...Sg4
- 2.Sf7#
- 2.Bxc7#
- 1...Sf7
- 2.Sxf7#
- 1...Sg8
- 2.Sf7#
- 2.Bxc7#
- 1...c6
- 2.Bf6#
- 2.Bc7#
- 1...Bxc4!
- threat
- 1.Qxh2+?
- 1...Rf4
- 2.Qxf4#
- 1...f4!
- 1...Rf4
- 1.Qxf1?
- threat
- 2.Qa1#
- 2.Qf4#
- 1...Rxd2
- 2.Qf4#
- 1...Bxf1
- 2.d4#
- 1...Rh1
- 2.Qf4#
- 1...Rf2
- 2.Qa1#
- 1...Bb1
- 2.Qf4#
- 2.d4#
- 1...Sg2
- 2.Sxg6#
- 2.Qa1#
- 1...Sf3
- 2.Sxg6#
- 1...f4
- 2.Qa1#
- 2.Qxf4#
- 1...g5
- 2.Qa1#
- 1...Bxc4!
- threat
- 1.Qg3+?
- 1...Rf4
- 2.Qxf4#
- 1...f4!
- 1...Rf4
- 1.Qg4?
- threat
- 2.Sxd3#
- 2.Qd4#
- 1...Bxc4
- 2.Sd3#
- 2.Qd4#
- 1...Sxg4
- 2.Sf7#
- 1...Rf4
- 2.Qxf4#
- 1...Bb1
- 2.Sd3#
- 2.Qd4#
- 2.d4#
- 1...Bc2
- 2.Sd3#
- 2.Qd4#
- 2.d4#
- 1...Be2
- 2.Sd3#
- 2.Qd4#
- 2.d4#
- 1...Be4
- 2.Sd3#
- 2.d4#
- 1...Sf3
- 2.Sxd3#
- 2.Sxg6#
- 2.Qf4#
- 1...f4
- 2.Qxe6#
- 1...fxg4!
- threat
- 1.Qg5?
- threat
- 2.Bf6#
- 2.Bxc7#
- 2.Qf6#
- 1...Sxg8
- 2.Sf7#
- 2.Bxc7#
- 1...Sg4
- 2.Sf7#
- 2.Bxc7#
- 1...Sf7
- 2.Sxf7#
- 2.Bf6#
- 2.Qf6#
- 1...c6
- 2.Bf6#
- 2.Bc7#
- 2.Qf6#
- 1...Bxc4!
- threat
- 1.Qxg6?
- threat
- 2.Bf6#
- 2.Bxc7#
- 2.Qxe6#
- 2.Qf6#
- 2.Qg7#
- 1...Sxg6
- 2.Sxg6#
- 1...Sxg8
- 2.Sf7#
- 2.Bxc7#
- 2.Qxe6#
- 1...Rg1
- 2.Bf6#
- 2.Bxc7#
- 2.Qxe6#
- 2.Qf6#
- 1...Rg2
- 2.Bf6#
- 2.Bxc7#
- 2.Qxe6#
- 2.Qf6#
- 1...Sg4
- 2.Sf7#
- 2.Bxc7#
- 2.Qxe6#
- 1...Sf7
- 2.Sxf7#
- 2.Bf6#
- 2.Qxe6#
- 2.Qf6#
- 2.Qg7#
- 1...c6
- 2.Bf6#
- 2.Bc7#
- 2.Qxe6#
- 2.Qf6#
- 2.Qg7#
- 1...Bxc4!
- threat
- 1.Sxe6+?
- Keys
- 1.Bxf5!
- threat
- 2.Sxd3#
- 1...Kxf5
- 2.Qg5#
- 1...Rxf5
- 2.Qa1#
- 1...Bxc4
- 2.Sd3#
- 1...Bxf5
- 2.d4#
- 1...S4xf5
- 2.Sxg6#
- 1...S6xf5
- 2.Sf7#
- 1...exf5
- 2.Re8#
- 1...gxf5
- 2.Qg7#
- 1...Bb1
- 2.Sd3#
- 1...Bc2
- 2.Sd3#
- 1...Be2
- 2.Sd3#
- 1...Be4
- 2.Sd3#
- threat
- 1.Bxf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 9
- REMOVED MATES = 8
- Sets
- R(a);OGATE::QAB(A),XR(a)
- R(a);OGATE::QAB(A)
- B(c);OGATE::P(B)
- S(d);N_GUARD::S(K),XP(h)
- S(i);N_GUARD::S(K)
- S(i);N_GUARD::S(K),XS(i)
- S(i);N_GUARD,XR(J)::S(K)
- Tries
- Try
- S(G);CHECK,XP(g)
- Vars
- K(e);P-FLIGHT::S(G)
- Refutation
- P(j);P_SPINP(j)
- Try
- B(D);
- Threat
- R(F)+S(G),DCHECK,XB(c)
- Vars
- S(d);N_GUARD,XB(D)::S(K),XP(h)
- R(a);OGATE::QAB(A)
- S(d);N_GUARD::S(K),XP(h)
- Refutation
- R(b);XB(D)
- Try
- R(J);XP(h)
- Threat
- DUALS(3)
- Vars
- S(d);XR(J)::S(K),XS(d)
- Refutation
- B(c);XP(E)
- Try
- R(J);
- Threat
- DUALS(2)
- Vars
- S(i);N_GUARD::S(K),XS(i)
- Refutation
- B(c);XP(E)
- Try
- Q(A);CHECK,XR(b)
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
- Refutation
- P(f);P_SPINP(f)
- Try
- Q(A);XR(a)
- Threat
- DUALS(2)
- Vars
- R(b);XP(B)::QAB1(A)
- B(c);OGATE,XQ(A)::P(B)
- R(b);::QAB1(A)
- R(b);::QAB(A)
- S(d);N_GUARD::S(K),XP(h)
- P(h);::QAB(A)
- Refutation
- B(c);XP(E)
- Try
- Q(A);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
- Refutation
- P(f);P_SPINP(f)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(i);N_GUARD,XQ(A)::S(K)
- R(a);N_GUARD::QAB1(A),XR(a)
- P(f);OGATE::QAR1(A),XP(g)
- Refutation
- P(f);XQ(A)
- Try
- Q(A);P_PINP(f)
- Threat
- DUALS(3)
- Refutation
- B(c);XP(E)
- Try
- Q(A);XP(h)
- Threat
- DUALS(5)
- Vars
- S(d);XQ(A)::S(K),XS(d)
- Refutation
- B(c);XP(E)
- Try
- Actual
- B(D);XP(f)
- Threat
- R(F)+S(G),DCHECK,XB(c)
- Vars
- K(e);OGATEB,P-FLIGHT,XB(D)::QAR1(A)
- R(a);OGATE,SBLOCK,XB(D)::QAB(A)
- B(c);XP(E)::R(F)+S(G),DCHECK
- B(c);OGATE,SBLOCK,XB(D)::P(B)
- S(d);N_GUARD,SBLOCK,XB(D)::S(K),XP(h)
- S(i);N_GUARD,SBLOCK,XB(D)::S(K)
- P(g);OGATEB,SBLOCK,XB(D)::R(J)
- P(h);OGATE,SBLOCK,XB(D)::QAB(A)
- B(c);::R(F)+S(G),DCHECK
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).