MESON Chess Problem Database
Problem Display
PID: 210419 (2R5/3N1K2/3p4/1p4p1/3kpQ1n/1P4R1/2Br1q1r/6Bb w - - 0 1)
Ellerman, Arnoldo
The Observer, 1921
(First published on Sun Jan 16 1921)
#2
8 + 10
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxg1
- 2.Qxd6#
- 1...Qe3
- 2.Qxd6#
- 1...Re2
- 2.Rd3#
- 1...Rd3
- 2.Rxd3#
- 1...Bf3
- 2.Qxd2#
- 1...Sf3
- 2.Qxe4#
- 1...Sf5
- 2.Qxd2#
- 1...d5
- 2.Qf6#
- 1...Qxg1
- Tries
- 1.Ke6?
- threat
- 2.Qxd2#
- 2.Qxd6#
- 2.Qf6#
- 1...Qxg1
- 2.Qxd6#
- 2.Qf6#
- 1...Rxc2
- 2.Qxd6#
- 2.Qf6#
- 1...Qe3
- 2.Bxe3#
- 2.Qxe3#
- 2.Qxd6#
- 2.Qf6#
- 1...Rd1
- 2.Qxd6#
- 2.Qf6#
- 1...Re2
- 2.Rd3#
- 2.Qxd6#
- 2.Qf6#
- 1...Rd3
- 2.Rxd3#
- 2.Qxd6#
- 2.Qf6#
- 1...Bf3
- 2.Qxd2#
- 1...Sf3
- 2.Qxe4#
- 1...Sf5
- 2.Qxd2#
- 1...Sg6
- 2.Qxd2#
- 2.Qxd6#
- 1...d5
- 2.Qxd2#
- 2.Qe5#
- 2.Qf6#
- 1...gxf4!
- threat
- 1.Bxf2+?
- 1...Kd5
- 2.Sb6#
- 2.Sf6#
- 2.Qxd2#
- 1...Rdxf2
- 2.Rd3#
- 1...Rhxf2!
- 1...Kd5
- 1.Rf3?
- threat
- 2.Qxd2#
- 2.Qxd6#
- 2.Qxe4#
- 1...Kd5
- 2.Qxe4#
- 1...Qxg1
- 2.Qxd6#
- 2.Qxe4#
- 1...Rxc2
- 2.Qxd6#
- 1...Bxf3
- 2.Qxd2#
- 1...Sxf3
- 2.Qxe4#
- 1...Qe3
- 2.Qxd6#
- 2.Qxe4#
- 1...Rd1
- 2.Qxd6#
- 2.Qxe4#
- 1...Re2
- 2.Rd3#
- 2.Qxd6#
- 1...Rd3
- 2.Rxd3#
- 2.Qxd6#
- 1...Sf5
- 2.Qxd2#
- 2.Qxe4#
- 1...d5
- 2.Qxd2#
- 2.Qe5#
- 2.Qf6#
- 1...gxf4!
- threat
- 1.Rc4+?
- 1...Kd5
- 2.Sf6#
- 1...bxc4!
- 1...Kd5
- 1.Ke6?
- Keys
- 1.Rc6!
- threat
- 2.Rxd6#
- 1...Kd5
- 2.Rxd6#
- 1...Bf3
- 2.Qxd2#
- 1...Qe3
- 2.Qxd6#
- 1...Rd3
- 2.Rxd3#
- 1...Sf3
- 2.Qxe4#
- 1...Sf5
- 2.Qxd2#
- 1...d5
- 2.Qf6#
- threat
- 1.Rc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- Q(c);N_PINQ(E),N_SPINQ(c),XB(A)::QAR2(E),XP(j)
- Q(c);N_PINQ(E)::QAR2(E),XP(j)
- R(b);N_GUARD::R1(D)
- R(b);N_GUARD::R1(D),XR(b)
- B(a);N_PINQ(E)::QAR2(E),XR(b)
- S(g);N_PINQ(E)::QAR1(E),XP(f)
- S(g);N_PINQ(E)::QAR2(E),XR(b)
- P(j);SBLOCK::QAB(E)
- Tries
- Try
- K(G);N_SPINQ(E),S_FLIGHT
- Threat
- DUALS(3)
- Vars
- B(a);::QAR2(E),XR(b)
- S(g);S_CUTB(a)::QAR1(E),XP(f)
- S(g);::QAR2(E),XR(b)
- Refutation
- P(i);N_SPINP(f),XQ(E)
- Try
- B(A);CHECK,N_SPINQ(E),XQ(c)
- Vars
- R(b);P_PINQ(E),XB(A)::R1(D)
- Refutation
- R(d);P_PINQ(E),XB(A)
- Try
- R(D);N_SPINQ(E)
- Threat
- DUALS(3)
- Vars
- K(e);N_SPINP(f),N_SPINQ(c),P-FLIGHT::QAB1(E),XP(f)
- R(b);XB(B)::QAR2(E),XP(j)
- B(a);XR(D)::QAR2(E),XR(b)
- S(g);XR(D)::QAR1(E),XP(f)
- Refutation
- P(i);N_SPINP(f),XQ(E)
- Try
- R(H);CHECK
- Vars
- K(e);N_SPINP(f),N_SPINQ(c),P-FLIGHT::S(F)
- Refutation
- P(h);XR(H)
- Try
- Actual
- R(H);
- Threat
- R(H),XP(j)
- Vars
- K(e);N_SPINP(f),N_SPINQ(c),P-FLIGHT::R1(H),XP(j)
- B(a);N_PINQ(E)::QAR2(E),XR(b)
- Q(c);N_PINQ(E)::QAR2(E),XP(j)
- R(b);N_GUARD::R1(D),XR(b)
- S(g);N_PINQ(E)::QAR1(E),XP(f)
- S(g);N_PINQ(E)::QAR2(E),XR(b)
- P(j);SBLOCK::QAB(E)
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