MESON Chess Problem Database
Problem Display
PID: 21658 (1nK5/1NB3R1/4p2n/8/r2k4/NRpppBp1/1p4P1/1Q6 w - - 0 1)
Gevers, Raymond
Good Companions (April), 1920
#2
9 + 10
| 3132 | The Good Companion Two-Mover | 1922 |
| 5503 | ISC | 2005 |
SOLUTION
- SOUND
- Sets
- 1...Rxa3
- 2.Rb4#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Sb5#
- 1...Ra5
- 2.Rb4#
- 1...Ra6
- 2.Rb4#
- 1...Ra7
- 2.Rb4#
- 1...Ra8
- 2.Rb4#
- 1...Sg4
- 2.Rxg4#
- 1...Sf5
- 2.Rg4#
- 1...Sf7
- 2.Rg4#
- 1...Sg8
- 2.Rg4#
- 1...Sa6
- 2.Rd7#
- 1...Sc6
- 2.Rd7#
- 1...Sd7
- 2.Rxd7#
- 1...c2
- 2.Qxb2#
- 1...d2
- 2.Qe4#
- 1...e2
- 2.Qg1#
- 1...e5
- 2.Bb6#
- 1...Rxa3
- Tries
- 1.Kxb8?
- threat
- 2.Rd7#
- 1...Rxa3
- 2.Rb4#
- 1...e2
- 2.Qg1#
- 1...Ra5
- 2.Rb4#
- 1...Ra6
- 2.Rb4#
- 1...Sf5
- 2.Rg4#
- 1...Sf7
- 2.Rg4#
- 1...Ra8+!
- threat
- 1.Bc6?
- 1...Rxa3
- 2.Rb4#
- 1...e2
- 2.Qg1#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Sb5#
- 1...Ra5
- 2.Rb4#
- 1...Ra6
- 2.Rb4#
- 1...Ra7
- 2.Rb4#
- 1...Ra8
- 2.Rb4#
- 1...Sg4
- 2.Rxg4#
- 1...Sf5
- 2.Rg4#
- 1...Sf7
- 2.Rg4#
- 1...Sg8
- 2.Rg4#
- 1...Sa6
- 2.Rd7#
- 1...Sd7
- 2.Rxd7#
- 1...c2
- 2.Qxb2#
- 1...d2
- 2.Qe4#
- 1...e5
- 2.Bb6#
- 1...Sxc6!
- 1...Rxa3
- 1.Bxb8?
- threat
- 2.Rd7#
- 1...Rxa3
- 2.Rb4#
- 1...e2
- 2.Qg1#
- 1...Ra5
- 2.Rb4#
- 1...Ra6
- 2.Rb4#
- 1...Sf5
- 2.Rg4#
- 1...Sf7
- 2.Rg4#
- 1...Rc4+!
- threat
- 1.Rxb2?
- 1...Rxa3
- 2.Rb4#
- 1...cxb2
- 2.Qxb2#
- 1...e2
- 2.Qg1#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Sb5#
- 1...Ra5
- 2.Rb4#
- 1...Ra6
- 2.Rb4#
- 1...Ra7
- 2.Rb4#
- 1...Ra8
- 2.Rb4#
- 1...Sg4
- 2.Rxg4#
- 1...Sf5
- 2.Rg4#
- 1...Sf7
- 2.Rg4#
- 1...Sg8
- 2.Rg4#
- 1...Sa6
- 2.Rd7#
- 1...Sc6
- 2.Rd7#
- 1...Sd7
- 2.Rxd7#
- 1...d2
- 2.Qe4#
- 1...e5
- 2.Bb6#
- 1...c2!
- 1...Rxa3
- 1.Rxc3?
- threat
- 2.Sb5#
- 2.Rxd3#
- 2.Qxd3#
- 1...Rxa3
- 2.Qxd3#
- 1...e2
- 2.Rxd3#
- 2.Qxd3#
- 1...Rb4
- 2.Rxd3#
- 2.Qxd3#
- 1...Ra5
- 2.Rxd3#
- 2.Rc4#
- 2.Qxd3#
- 1...d2
- 2.Sb5#
- 2.Rd3#
- 2.Qd3#
- 1...Kxc3!
- threat
- 1.Rb5?
- threat
- 2.Be5#
- 2.Bb6#
- 1...Rxa3
- 2.Rb4#
- 1...c2
- 2.Be5#
- 2.Qxb2#
- 1...e2
- 2.Bb6#
- 2.Qg1#
- 1...Ra6
- 2.Be5#
- 2.Rb4#
- 1...Sg4
- 2.Bb6#
- 2.Rxg4#
- 1...Sf7
- 2.Bb6#
- 2.Rg4#
- 1...Sa6
- 2.Be5#
- 2.Rd7#
- 1...Sc6
- 2.Bb6#
- 2.Rd7#
- 1...Sd7
- 2.Rxd7#
- 1...e5
- 2.Bxe5#
- 2.Bb6#
- 2.Rd5#
- 1...Rc4!
- threat
- 1.Rg5?
- threat
- 2.Be5#
- 2.Bb6#
- 1...Rxa3
- 2.Rb4#
- 1...e2
- 2.Bb6#
- 2.Qg1#
- 1...Sa6
- 2.Be5#
- 1...Rb4
- 2.Be5#
- 2.Rxb4#
- 1...Rc4
- 2.Sb5#
- 1...Ra5
- 2.Rb4#
- 1...Ra6
- 2.Be5#
- 2.Rb4#
- 1...Sg4
- 2.Bb6#
- 2.Rxg4#
- 1...Sf5
- 2.Rg4#
- 1...Sf7
- 2.Bb6#
- 2.Rg4#
- 1...Sc6
- 2.Bb6#
- 1...e5
- 2.Bxe5#
- 2.Bb6#
- 1...Sd7!
- threat
- 1.Kxb8?
- Keys
- 1.Rb6!
- 1...Rxa3
- 2.Rb4#
- 1...c2
- 2.Qxb2#
- 1...e2
- 2.Qg1#
- 1...Rb4
- 2.Rxb4#
- 1...Rc4
- 2.Sb5#
- 1...Ra5
- 2.Rb4#
- 1...Ra6
- 2.Rb4#
- 1...Ra7
- 2.Rb4#
- 1...Ra8
- 2.Rb4#
- 1...Sg4
- 2.Rxg4#
- 1...Sf5
- 2.Rg4#
- 1...Sf7
- 2.Rg4#
- 1...Sg8
- 2.Rg4#
- 1...Sa6
- 2.Rd7#
- 1...Sc6
- 2.Rd7#
- 1...Sd7
- 2.Rxd7#
- 1...d2
- 2.Qe4#
- 1...e5
- 2.Rd6#
- 1...Rxa3
- 1.Rb6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(f);N_GUARD,XS(C)::R(D)
- R(f);N_GUARD::R(D),XR(f)
- R(f);P_PINB(G),SBLOCK::S(C)
- R(f);N_GUARD::R(D)
- S(i);N_GUARD::R(H),XS(i)
- S(i);N_GUARD::R(H)
- S(j);N_GUARD::R(H)
- S(j);N_GUARD::R(H),XS(j)
- P(b);OGATEB::QAB(A),XP(a)
- P(c);OGATE::QAR1(A)
- P(d);OGATEB::QAB(A)
- P(h);SBLOCK::B(G)
- Tries
- Try
- K(I);P-FLIGHT,XS(j)
- Threat
- R(H)
- Vars
- R(f);N_GUARD,XS(C)::R(D)
- P(d);OGATEB::QAB(A)
- R(f);N_GUARD::R(D)
- S(i);N_GUARD::R(H)
- Refutation
- R(f);CHECK
- Try
- B(E);
- Vars
- R(f);N_GUARD,XS(C)::R(D)
- P(d);OGATEB::QAB(A)
- R(f);N_GUARD::R(D),XR(f)
- R(f);SBLOCK::S(C)
- R(f);N_GUARD::R(D)
- S(i);N_GUARD::R(H),XS(i)
- S(i);N_GUARD::R(H)
- S(j);N_GUARD::R(H)
- S(j);N_GUARD::R(H),XS(j)
- P(b);OGATEB::QAB(A),XP(a)
- P(c);OGATE::QAR1(A)
- P(h);SBLOCK::B(G)
- Refutation
- S(j);XB(E)
- Try
- B(G);XS(j)
- Threat
- R(H)
- Vars
- R(f);N_GUARD,XS(C)::R(D)
- P(d);OGATEB::QAB(A)
- R(f);N_GUARD::R(D)
- S(i);N_GUARD::R(H)
- Refutation
- R(f);CHECK
- Try
- R(D);XP(a)
- Vars
- R(f);N_GUARD,XS(C)::R(D)
- P(b);OGATE,XR(D)::QAB(A),XP(b)
- P(d);OGATEB::QAB(A)
- R(f);N_GUARD::R(D),XR(f)
- R(f);P_PINB(G),SBLOCK::S(C)
- R(f);N_GUARD::R(D)
- S(i);N_GUARD::R(H),XS(i)
- S(i);N_GUARD::R(H)
- S(j);N_GUARD::R(H)
- S(j);N_GUARD::R(H),XS(j)
- P(c);OGATE::QAR1(A)
- P(h);SBLOCK::B(G)
- Refutation
- P(b);
- Try
- R(D);XP(b)
- Threat
- DUALS(3)
- Vars
- R(f);XS(C)::QAR1(A),XP(c)
- Refutation
- K(g);S_FLIGHT,XR(D)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- R(f);N_GUARD,XS(C)::R(D)
- S(j);N_GUARD::R(H),XS(j)
- Refutation
- R(f);P_PINB(G)
- Try
- R(H);
- Threat
- DUALS(2)
- Vars
- R(f);N_GUARD,XS(C)::R(D)
- S(j);::B(G)
- R(f);P_PINB(G),SBLOCK::S(C)
- R(f);N_GUARD::R(D)
- S(i);N_GUARD::R(H)
- Refutation
- S(j);
- Try
- Actual
- R(D);
- Vars
- R(f);N_GUARD,XS(C)::R(D)
- P(b);OGATEB::QAB(A),XP(a)
- P(d);OGATEB::QAB(A)
- R(f);N_GUARD::R(D),XR(f)
- R(f);P_PINB(G),SBLOCK::S(C)
- R(f);N_GUARD::R(D)
- S(i);N_GUARD::R(H),XS(i)
- S(i);N_GUARD::R(H)
- S(j);N_GUARD::R(H)
- S(j);N_GUARD::R(H),XS(j)
- P(c);OGATE::QAR1(A)
- P(h);SBLOCK::R(D)
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