MESON Chess Problem Database

Problem Display
PID: 253089 (8/5B2/N2p4/2NP2p1/Rppk4/7R/7Q/2b2K2 w - - 0 1)

Ros, Johan August

Manchester Weekly Times, 1890

(First published on Sat Apr 12 1890)

8/5B2/N2p4/2NP2p1/Rppk4/7R/7Q/2b2K2

#2

8 + 6

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Rd3#
    • 1...c3
      • 2.Rxb4#
  • Tries
    • 1.Sb3+?
      • 1...cxb3
        • 2.Rxb4#
      • 1...Ke4!
    • 1.Rxb4?
      • threat
        • 2.Rd3#
      • 1...Be3
        • 2.Qb2#
      • 1...Bf4
        • 2.Qb2#
      • 1...dxc5!
    • 1.Qg1+?
      • 1...Be3
        • 2.Qxe3#
      • 1...Ke5!
    • 1.Qxd6?
      • threat
        • 2.Qf6#
      • 1...c3
        • 2.Rxb4#
      • 1...Bf4!
    • 1.Qb2+?
      • 1...c3
        • 2.Qxc3#
      • 1...Bxb2!
    • 1.Qe2?
      • threat
        • 2.Qe4#
      • 1...Be3
        • 2.Qxe3#
      • 1...dxc5!
    • 1.Qf2+?
      • 1...Be3
        • 2.Qxe3#
        • 2.Qf6#
      • 1...Ke5!
  • Keys
    • 1.Re3!
      • 1...Kxe3
        • 2.Qf2#
      • 1...Bxe3
        • 2.Qh8#
      • 1...dxc5
        • 2.Qe5#
      • 1...c3
        • 2.Re4#
      • 1...Bb2
        • 2.Qd2#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Ba3
        • 2.Qd2#
      • 1...b3
        • 2.Rd3#
      • 1...g4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(b);P_SPINP(c)::R1(C)
    • P(c);OGATEB,P_SPINP(b)::R(D),XP(b)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(c);P_SPINP(b),XS(E)::R(D),XP(b)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(D);P_PINP(c),XP(b)
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD::QAB(B)
      • Refutation
        • P(f);XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);XP(f)
      • Threat
        • QAB(B)
      • Vars
        • P(c);OGATEB,P_SPINP(b)::R(D),XP(b)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);P_SPINP(c),S_CUTP(b)::QAB1(B),XP(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • B(a);N_GUARD::QAB1(B),XB(a)
      • Refutation
        • P(f);XS(E)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(C);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • B(a);SBLOCK,XR(C)::QAB(B)
      • P(f);N_GUARD,XS(E)::QAB1(B)
      • P(c);P_SPINP(b),SBLOCK::R1(C)
      • B(a);N_GUARD::QAR2(B)
      • B(a);N_GUARD::QAR2(B),XB(a)
      • P(b);P_SPINP(c)::R1(C)
      • P(e);N_GUARD::QAR2(B)
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