MESON Chess Problem Database
Problem Display
PID: 240236 (4R1r1/8/2p1N1n1/n3NkB1/K3R1r1/7p/7P/1B5Q w - - 0 1)
Ellerman, Arnoldo
Tijdschrift vd KNSB, 1931
#2
9 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Re1#
- 1...Rg2
- 2.Re2#
- 1...Rg3
- 2.Re3#
- 1...Rxe4+
- 2.Qxe4#
- 1...Sxe5
- 2.Rf4#
- 1...Rg1
- Tries
- 1.Sc4?
- threat
- 2.Se3#
- 2.Sd6#
- 2.Rf4#
- 2.Re5#
- 1...Rxe4
- 2.Qxe4#
- 1...Rxg5
- 2.Rf4#
- 1...Rxe8
- 2.Se3#
- 2.Sd6#
- 2.Re5#
- 1...Rf4
- 2.Se3#
- 2.Rxf4#
- 1...Sf4
- 2.Rxf4#
- 2.Re5#
- 1...Sh4
- 2.Rf4#
- 2.Re5#
- 1...Se5
- 2.Rf4#
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Rf4#
- 2.Re5#
- 1...Sh8
- 2.Rf4#
- 2.Re5#
- 1...Rg1
- 2.Se3#
- 2.Sd6#
- 2.Rf4#
- 1...Rg2
- 2.Se3#
- 2.Sd6#
- 2.Rf4#
- 1...Rg3
- 2.Sd6#
- 2.Rf4#
- 1...Rh4
- 2.Se3#
- 2.Sd6#
- 2.Rf4#
- 2.Rxh4#
- 1...Sb7
- 2.Se3#
- 2.Rf4#
- 2.Re5#
- 1...Sxc4!
- threat
- 1.Sxg4?
- threat
- 2.Se3#
- 2.Sh6#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 1...Rxe8
- 2.Se3#
- 2.Sh6#
- 1...Sf4
- 2.Rxf4#
- 1...Sh4
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 1...Se5
- 2.Rf4#
- 1...Sf8
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 1...Sh8
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 1...Rh8
- 2.Se3#
- 2.Rb4#
- 2.Rc4#
- 2.Rd4#
- 2.Rf4#
- 1...Sc4
- 2.Sh6#
- 2.Rxc4#
- 2.Rd4#
- 2.Rf4#
- 1...Se7!
- threat
- 1.Sxc6?
- threat
- 2.Scd4#
- 2.Rf4#
- 1...Rxe4+
- 2.Qxe4#
- 1...Rxg5
- 2.Rf4#
- 1...Rxe8
- 2.Scd4#
- 1...Rf4
- 2.Rxf4#
- 1...Sf4
- 2.Se7#
- 2.Rxf4#
- 2.Re5#
- 1...Sh4
- 2.Se7#
- 2.Rf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Sxe7#
- 1...Sf8
- 2.Se7#
- 2.Rf4#
- 1...Sh8
- 2.Se7#
- 2.Rf4#
- 1...Sb3
- 2.Rf4#
- 1...Sxc6!
- threat
- 1.Sf7?
- threat
- 2.Sd4#
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Rxe4+
- 2.Qxe4#
- 1...Rxg5
- 2.Rf4#
- 1...Rxe8
- 2.Sd4#
- 2.Sg7#
- 2.Sd6#
- 2.Sh6#
- 1...Rf4
- 2.Sh6#
- 2.Rxf4#
- 1...Sf4
- 2.Rxf4#
- 2.Re5#
- 1...Sh4
- 2.Rf4#
- 1...Se5
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Rh4
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 2.Rxh4#
- 1...Rh8
- 2.Sd4#
- 2.Sg7#
- 2.Sd6#
- 2.Rf4#
- 1...Sb3
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Sc4
- 2.Sd4#
- 2.Sh6#
- 2.Rf4#
- 2.Re5#
- 1...Sb7
- 2.Sd4#
- 2.Sh6#
- 2.Rf4#
- 1...c5
- 2.Sd6#
- 2.Sh6#
- 2.Rf4#
- 1...Se7!
- threat
- 1.Sg7+?
- 1...Rxg7
- 2.Rxg4#
- 1...Kxg5!
- 1...Rxg7
- 1.Rb4+?
- 1...Re4
- 2.Qxe4#
- 1...Kxe5!
- 1...Re4
- 1.Rc4+?
- 1...Re4
- 2.Qxe4#
- 1...Kxe5!
- 1...Re4
- 1.Rd4+?
- 1...Re4
- 2.Qxe4#
- 1...Kxe5!
- 1...Re4
- 1.Qg2?
- threat
- 2.Qxg4#
- 1...Rxe4+
- 2.Sd4#
- 2.Qxe4#
- 1...Rxg2
- 2.Re2#
- 1...Rxg5
- 2.Qxg5#
- 1...Sxe5
- 2.Rf4#
- 1...Rg3
- 2.Re3#
- 1...Rf4
- 2.Sd4#
- 1...Rh4
- 2.Sd4#
- 1...hxg2!
- threat
- 1.Qf3+?
- 1...Sf4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Qxg4#
- 1...Rf4!
- 1...Sf4
- 1.Qf1+?
- 1...Sf4
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 1...Rf4!
- 1...Sf4
- 1.Sc4?
- Keys
- 1.Qg1!
- threat
- 2.Qxg4#
- 1...Rxe4+
- 2.Sd4#
- 1...Rxg1
- 2.Re1#
- 1...Rxg5
- 2.Qxg5#
- 1...Sxe5
- 2.Rf4#
- 1...Rf4
- 2.Sd4#
- 1...Rg2
- 2.Re2#
- 1...Rg3
- 2.Re3#
- 1...Rh4
- 2.Sd4#
- threat
- 1.Qg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(b);N_PINR(E)::B(A)+R(E)
- R(b);CHECK,OGATE,P_SPINR(b),XR(E)::QAB1(B),XR(b)
- S(f);SBLOCK,XS(F)::B(A)+R(E),DCHECK
- Tries
- Try
- S(F);N_SPINR(E)
- Threat
- DUALS(4)
- Vars
- R(b);OGATE,P_PINS(F),P_SPINR(b),XR(E)::QAB1(B),XR(b)
- R(b);XB(G)::B(A)+R(E),DCHECK
- S(f);::B(A)+R(E),DCHECK
- Refutation
- S(c);XS(F)
- Try
- S(F);N_SPINR(E),XR(b)
- Threat
- DUALS(6)
- Vars
- S(f);::B(A)+R(E),DCHECK,XS(f)
- S(f);::B(A)+R(E),DCHECK
- Refutation
- S(f);
- Try
- S(F);XP(e)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XR(E)::QAB1(B),XR(b)
- R(b);N_PINR(E),XB(G)::B(A)+R(E),DCHECK
- R(g);XR(I)::S(F)
- R(b);::B(A)+R(E),DCHECK,XR(b)
- S(f);::B(A)+R(E),DCHECK
- S(f);N_GUARD::S(F),XS(f)
- S(c);::B(A)+R(E),DCHECK
- Refutation
- S(c);XS(F)
- Try
- S(F);
- Threat
- DUALS(4)
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XR(E)::QAB1(B),XR(b)
- R(b);N_PINR(E),XB(G)::B(A)+R(E),DCHECK
- S(f);::B(A)+R(E),DCHECK
- Refutation
- S(f);
- Try
- S(H);CHECK
- Vars
- R(g);XS(H)::B(A)+R(E),XR(b)
- Refutation
- K(d);P-FLIGHT,XB(G)
- Try
- R(E);CHECK
- Vars
- R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
- Refutation
- K(d);P-FLIGHT,XS(F)
- Try
- R(E);CHECK
- Vars
- R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
- Refutation
- K(d);P-FLIGHT,XS(F)
- Try
- R(E);CHECK
- Vars
- R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
- Refutation
- K(d);P-FLIGHT,XS(F)
- Try
- Q(B);
- Threat
- QAB1(B),XR(b)
- Vars
- R(b);N_PINR(E),XQ(B)::B(A)+R(E)
- R(b);N_PINR(E),OGATE,XB(G)::QAR1(B),XR(b)
- S(f);SBLOCK,XS(F)::B(A)+R(E),DCHECK
- R(b);N_PINR(E)::B(A)+R(E)
- R(b);::S(H)
- Refutation
- P(a);XQ(B)
- Try
- Q(B);CHECK
- Refutation
- R(b);P_SPINR(b)
- Try
- Q(B);CHECK
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- Q(B);
- Threat
- QAB1(B),XR(b)
- Vars
- R(b);CHECK,P_SPINR(b),XR(E)::S(H)
- R(b);N_PINR(E),XQ(B)::B(A)+R(E)
- R(b);N_PINR(E),OGATE,XB(G)::QAR1(B),XR(b)
- S(f);SBLOCK,XS(F)::B(A)+R(E),DCHECK
- R(b);::S(H)
- R(b);N_PINR(E)::B(A)+R(E)
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).