MESON Chess Problem Database

Problem Display
PID: 245702 (1B1n4/5rb1/1pPR2K1/4k1PR/1N2Prp1/1pp3Q1/2B2p1N/q1nb4 w - - 0 1)

Wirtanen, Erkki Aukusti

Magyar Sakkelet, 1959

1B1n4/5rb1/1pPR2K1/4k1PR/1N2Prp1/1pp3Q1/2B2p1N/q1nb4

#2

11 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxc3#
    • 1...Qa2
      • 2.Qxc3#
    • 1...Qa3
      • 2.Qxc3#
    • 1...Qa4
      • 2.Qxc3#
    • 1...Qa5
      • 2.Qxc3#
    • 1...Qa6
      • 2.Qxc3#
    • 1...Qa7
      • 2.Qxc3#
    • 1...Qa8
      • 2.Qxc3#
    • 1...Rf6+
      • 2.gxf6#
    • 1...Bf6
      • 2.gxf6#
    • 1...Se2
      • 2.Sxg4#
    • 1...Sxc6
      • 2.Sxc6#
    • 1...Se6
      • 2.Rd5#
    • 1...b2
      • 2.Qxc3#
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qd4#
      • 1...R4f6+
        • 2.gxf6#
      • 1...R7f6+
        • 2.Rxf6#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...Rf3
        • 2.Sxg4#
      • 1...R4f5
        • 2.exf5#
      • 1...Se2
        • 2.Sd3#
      • 1...Se6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD::QAB(C),XP(f)
    • R(k);CHECK,OGATE::R(G)+P(F),XR(k)
    • B(l);OGATE::R(G)+P(F),XB(l)
    • S(b);S_CUTB(c)::S(B),XP(h)
    • S(m);XP(H)::S(D),XS(m)
    • S(m);SBLOCK::B(K)+R(I),DCHECK
    • P(e);S_CUTQ(a)::QAB(C),XP(f)
  • Actual
    • Q(C);N_PINR(g)
    • Threat
      • QAB1(C)
    • Vars
      • R(g);CHECK,OGATE::R(G)+P(F),XR(g)
      • R(k);CHECK,N_GUARD::B(K)+R(I),XR(k)
      • R(g);OGATE,P_SPINR(g),XP(E)::QAR1(C),XR(g)
      • S(m);XP(H)::S(D),XS(m)
      • R(g);N_GUARD,S_CUTB(c)::S(B),XP(h)
      • R(g);OGATE::QAR(C)+P(E),XR(g)
      • S(b);N_GUARD::S(D)
      • S(m);SBLOCK::B(K)+R(I),DCHECK
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