MESON Chess Problem Database
Problem Display
PID: 235620 (nB2B3/1Qr1Pr2/1p3N2/1P1p2P1/3R4/2n2k1P/7R/K4N2 w - - 0 1)
Ellerman, Arnoldo
Norsk Sjakkblad, 1951
#2
12 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rc4
- 2.Rd3#
- 1...Rc5
- 2.Rd3#
- 2.Rf4#
- 1...Rc6
- 2.Rd3#
- 2.Rf4#
- 1...Rxb7
- 2.Rd3#
- 2.Rf4#
- 1...Rd7
- 2.Rd3#
- 2.Rf4#
- 1...Rcxe7
- 2.Rf4#
- 1...Rc8
- 2.Rd3#
- 2.Rf4#
- 1...Rxf6
- 2.Bh5#
- 1...Rfxe7
- 2.Bh5#
- 1...Rg7
- 2.Bh5#
- 1...Rf8
- 2.Bh5#
- 1...Sb1
- 2.Qxd5#
- 1...Sd1
- 2.Qxd5#
- 1...Sa2
- 2.Qxd5#
- 1...Se2
- 2.Qxd5#
- 1...Sa4
- 2.Qxd5#
- 1...Sxb5
- 2.Qxd5#
- 1...Rc4
- Tries
- 1.Sg4?
- threat
- 2.Se5#
- 2.Rf2#
- 1...Rcxe7
- 2.Sd2#
- 2.Rf2#
- 1...Rfxe7
- 2.Rf2#
- 1...Rf5
- 2.Rf2#
- 1...Sd1
- 2.Se5#
- 2.Qxd5#
- 1...Se4!
- threat
- 1.Bxc7?
- threat
- 2.Rd3#
- 2.Rf4#
- 1...Rxf6
- 2.Bh5#
- 1...Rxe7
- 2.Bh5#
- 2.Rf4#
- 1...Sd1
- 2.Rf4#
- 2.Qxd5#
- 1...Se2
- 2.Rd3#
- 2.Qxd5#
- 1...Se4
- 2.Rd3#
- 1...Sxc7!
- threat
- 1.Bd7?
- threat
- 2.Bg4#
- 1...Rxd7
- 2.Rd3#
- 2.Rf4#
- 1...Se4!
- threat
- 1.Rxd5?
- threat
- 2.Rf5#
- 1...Kf4
- 2.Rf2#
- 1...Sxd5!
- threat
- 1.Qxd5+?
- 1...Se4
- 2.Qxe4#
- 2.Qf5#
- 1...Sxd5!
- 1...Se4
- 1.Qc8?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Rxc8
- 2.Rd3#
- 2.Rf4#
- 1...Rxf6
- 2.Bh5#
- 2.Qg4#
- 1...Rd7
- 2.Rd3#
- 2.Rf4#
- 2.Qxc3#
- 1...Se2
- 2.Qg4#
- 1...Ra7+!
- threat
- 1.Qxc7?
- threat
- 2.Rd3#
- 2.Rf4#
- 2.Qg3#
- 2.Qf4#
- 2.Qxc3#
- 1...Rxf6
- 2.Bh5#
- 2.Qg3#
- 2.Qxc3#
- 1...Rxe7
- 2.Bh5#
- 2.Rf4#
- 2.Qg3#
- 2.Qf4#
- 1...Sxb5
- 2.Rd3#
- 2.Rf4#
- 2.Qg3#
- 2.Qf4#
- 1...Sb1
- 2.Rd3#
- 2.Rf4#
- 2.Qg3#
- 2.Qf4#
- 1...Sd1
- 2.Rf4#
- 2.Qg3#
- 2.Qf4#
- 1...Sa2
- 2.Rd3#
- 2.Rf4#
- 2.Qg3#
- 2.Qf4#
- 1...Se2
- 2.Rd3#
- 1...Sa4
- 2.Rd3#
- 2.Rf4#
- 2.Qg3#
- 2.Qf4#
- 1...Se4
- 2.Rd3#
- 2.Qf4#
- 1...Sxc7!
- threat
- 1.Sg4?
- Keys
- 1.Sxd5!
- 1...Rxb7
- 2.Sd2#
- 1...Rcxe7
- 2.Sd2#
- 1...Rfxe7
- 2.Bh5#
- 2.Rf4#
- 1...Sxb5
- 2.Sxc7#
- 1...Sxd5
- 2.Qxd5#
- 1...Rc4
- 2.Sd2#
- 1...Rc5
- 2.Sd2#
- 1...Rc6
- 2.Sd2#
- 1...Rd7
- 2.Sd2#
- 1...Rc8
- 2.Sd2#
- 1...Rf4
- 2.Rxf4#
- 1...Rf5
- 2.Bh5#
- 1...Rf6
- 2.Bh5#
- 1...Rg7
- 2.Bh5#
- 2.Rf4#
- 1...Rh7
- 2.Rf4#
- 1...Rf8
- 2.Bh5#
- 1...Sb1
- 2.Sxc7#
- 1...Sd1
- 2.Sxc7#
- 1...Sa2
- 2.Sxc7#
- 1...Se2
- 2.Sxc7#
- 1...Sa4
- 2.Sxc7#
- 1...Se4
- 2.Rd3#
- 1...Rxb7
- 1.Sxd5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 8
- ADDED MATES = 10
- REMOVED MATES = 2
- Sets
- R(e);::R(E)
- R(e);XP(J)::R1(E)
- R(f);OGATE,XS(H)::B(L)
- R(f);OGATE,XP(J)::B(L)
- R(f);OGATE::B(L)
- S(a);N_GUARD::QAB(I),XP(c)
- S(a);N_GUARD,XP(F)::QAB(I),XP(c)
- Tries
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(f);XP(J)::R1(C)
- R(f);::R1(C)
- Refutation
- S(a);N_SPINP(c)
- Try
- B(K);XR(e)
- Threat
- DUALS(2)
- Vars
- R(f);OGATE,XS(H)::B(L)
- S(a);N_SPINP(c)::R(E)
- Refutation
- S(g);XB(K)
- Try
- B(L);
- Threat
- B(L)
- Refutation
- S(a);N_SPINP(c)
- Try
- R(E);XP(c)
- Threat
- QAB(I)+R(E),DCHECK
- Vars
- K(b);P-FLIGHT,P_SPINR(e)::R(C)
- Refutation
- S(a);P_SPINS(a),XR(E)
- Try
- Q(I);CHECK,XP(c)
- Refutation
- S(a);XQ(I)
- Try
- Q(I);N_PINP(c)
- Threat
- DUALS(2)
- Vars
- S(a);::QAB1(I)
- Refutation
- R(e);CHECK
- Try
- Q(I);N_PINP(c),XR(e)
- Threat
- DUALS(5)
- Vars
- S(a);::R(E)
- Refutation
- S(g);XQ(I)
- Try
- Actual
- S(H);XP(c)
- Vars
- R(e);XQ(I)::S(B)
- R(e);XP(J)::S(B)
- S(a);N_GUARD,XP(F)::QAB(I)+S(H),XR(e)
- S(a);OGATE,P_SPINS(a),XS(H)::QAB(I),XS(a)
- R(e);::S(B)
- R(f);N_GUARD::R1(E),XR(f)
- R(f);OGATE::B(L)
- R(f);N_GUARD::R1(E)
- S(a);N_GUARD::QAB(I)+S(H),XR(e)
- S(a);SBLOCK::R(E)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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