MESON Chess Problem Database

Problem Display
PID: 193430 (8/q1p1p3/2P5/pBp2p2/NPP4Q/b2k2P1/4R1R1/1n5K w - - 0 1)

Hody, Janos

Pesti Naplo, 1914

8/q1p1p3/2P5/pBp2p2/NPP4Q/b2k2P1/4R1R1/1n5K

#2

10 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...cxb4
      • 2.c5#
    • 1...e5
      • 2.Qd8#
    • 1...e6
      • 2.Qd8#
  • Tries
    • 1.Rd2+?
      • 1...Ke3
        • 2.Qf4#
      • 1...Sxd2!
    • 1.Qxe7?
      • threat
        • 2.Qd8#
        • 2.Qe3#
        • 2.Qd7#
      • 1...Kd4
        • 2.Qd8#
        • 2.Qe3#
        • 2.Qd7#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Qb8
        • 2.Qe3#
        • 2.Qd7#
      • 1...Qa8
        • 2.Qe3#
        • 2.Qd7#
      • 1...Bc1
        • 2.Qd8#
        • 2.Qd7#
      • 1...Bb2
        • 2.Qe3#
      • 1...Sc3
        • 2.Rd2#
        • 2.Qe3#
      • 1...f4
        • 2.Qd8#
        • 2.Qe4#
        • 2.Qd7#
      • 1...cxb4!
    • 1.Qd4+?
      • 1...cxd4
        • 2.c5#
      • 1...Kxd4!
    • 1.Qf4?
      • threat
        • 2.Re3#
        • 2.Qe3#
      • 1...cxb4
        • 2.c5#
      • 1...Sd2
        • 2.Rxd2#
        • 2.Qxd2#
      • 1...Bc1!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qd8#
      • 1...cxb4
        • 2.c5#
      • 1...Sd2
        • 2.Qc3#
      • 1...Qb8
        • 2.Sxc5#
      • 1...Qa8
        • 2.Sxc5#
      • 1...Bb2
        • 2.Sxb2#
      • 1...Sc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • P(e);OGATE,XP(F)::B(I)+P(G)
    • P(i);OGATE::QAR(H)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(H)
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(H);XP(i)
      • Threat
        • DUALS(3)
      • Vars
        • S(a);N_GUARD::R1(B),XS(a)
        • B(b);::QAR1(H)
      • Refutation
        • P(e);XP(F)
    • Try
      • Q(H);CHECK
      • Vars
        • P(e);OGATE,SBLOCK,XQ(H)::B(I)+P(G)
      • Refutation
        • K(c);P-FLIGHT,XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);OGATE,XP(F)::B(I)+P(G)
      • Refutation
        • B(b);
  • Actual
    • Q(H);
    • Threat
      • QAR(H)
    • Vars
      • P(e);OGATE,XP(F)::B(I)+P(G)
      • S(a);N_GUARD::QAR1(H)
      • Q(g);N_GUARD::S(E),XP(e)
      • B(b);N_GUARD::S(E),XB(b)
      • S(a);N_GUARD::QAR1(H),XS(a)
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